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Extended Addition Property of Equality
The Extended Addition Property of Equality generalizes the basic Addition Property by allowing different but equal quantities to be added to the two sides of an equation, rather than requiring the same quantity on both sides. Formally, for any expressions , , , and :
If and , then .
The basic Addition Property is a special case of this rule (where and happen to be the same value). The extended version is essential to the elimination method for solving systems of equations because it justifies adding the left-hand sides and right-hand sides of two different equations together: each equation is a statement of equality, so the two left sides and two right sides are equal quantities, and combining them preserves equality. For example, given and , the property guarantees that , which simplifies to .
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Elementary Algebra @ OpenStax
Ch.5 Systems of Linear Equations - Elementary Algebra @ OpenStax
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Related
Solving Using the Addition Property
Solving Using the Addition Property
Solving Using the Addition Property
Solving by Collecting Variables and Constants
Extended Addition Property of Equality
Maintaining Balance in Financial Accounts
Equity in Salary Adjustments
The Principle of Mathematical Balance in Professional Documentation
Solving Using the Addition Property
If , and the same number is added to both sides, which equation is true?
Arrange the steps in order to show how the Addition Property of Equality is used to solve .
To solve , you add 20 to both sides. Which property justifies this step?
If , then . This is the _____ Property of Equality.
. Using the Addition Property of Equality, if 25 is added to , what must be done to ?
If , then for any number . True or False?
Match each item with the correct part of the Addition Property of Equality.
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A logistics coordinator is managing two separate delivery routes. For Route A, the planned distance (d1) is equal to the actual distance traveled (a1). For Route B, the planned distance (d2) is equal to the actual distance traveled (a2). Which mathematical property justifies the statement that the total planned distance (d1 + d2) is equal to the total actual distance (a1 + a2)?
In a business inventory system, if the physical count of Product A equals its recorded value (a = r) and the physical count of Product B equals its recorded value (b = s), the Extended Addition Property of Equality states that the total physical count is equal to the sum of the records, expressed as a + b = ____.
A retail manager is balancing two separate cash registers. For Register 1, the cash on hand (c1) equals the recorded sales (s1). For Register 2, the cash on hand (c2) equals the recorded sales (s2). The Extended Addition Property of Equality states that if c1 = s1 and c2 = s2, then c1 + c2 = s1 + s2.
Reconciling Invoice Quantities
An HR payroll specialist is verifying total compensation for an employee. The base salary (S) is equal to the contracted amount (C), and the performance bonus (B) is equal to the approved incentive (I). Match each mathematical expression or term with its correct role in applying the Extended Addition Property of Equality to calculate the total pay.
A project manager is consolidating the financial reports for two different project phases. Phase 1's actual expenses () equal its budget (), and Phase 2's actual expenses () equal its budget (). Arrange the steps below in the correct logical order to demonstrate how the Extended Addition Property of Equality justifies that the total expenses equal the total budget.
Corporate Revenue Verification
Defining the Extended Addition Property for Financial Auditing
A logistics manager is auditing two regional distribution centers. In Center A, the number of incoming units (Ua) is equal to the number of outgoing units (Oa). In Center B, the number of incoming units (Ub) is equal to the number of outgoing units (Ob). If the manager applies the Extended Addition Property of Equality to find the combined totals of both centers, which equation correctly represents this property?
A project manager is consolidating the financial results of two separate project phases. For Phase 1, the actual cost () is equal to the budget (). For Phase 2, the actual cost () is equal to the budget (). Which statement best describes the principle of the Extended Addition Property of Equality as it applies to the total costs () and the total budget ()?