Solving by Collecting Variables and Constants
To solve , observe that variable terms ( and ) and constant terms ( and ) appear on both sides of the equation. Because is greater than , designate the left side as the variable side and the right side as the constant side.
Step 1 — Remove the variable term from the constant side: Since is on the constant side, subtract from both sides using the Subtraction Property of Equality:
Combine like terms: . Now the variable appears only on the left.
Step 2 — Remove the constant from the variable side: The constant is on the variable side, so subtract from both sides:
Because the coefficient of is already , no further division is needed.
Step 3 — Check by substitution: Replace with in the original equation:
Because both sides are equal, is confirmed as the correct solution. Unlike equations where only variables or only constants need to be collected, this example required two collecting steps — first gathering all variable terms onto the left side and then gathering all constant terms onto the right side — before the solution could be read directly.
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In a retail inventory system, if two store locations have the same number of units in stock and both sell the exact same number of units today, their remaining stock levels will still be equal. This is a real-world application of the ____ Property of Equality.
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A logistics manager uses the equation 7x + 5 = 6x + 2 to compare the costs of two shipping providers. Based on the standard procedure for collecting variables and constants, arrange the following steps in the correct order to solve for x.
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An inventory manager is comparing two supply chain models using the equation 7x + 5 = 6x + 2. Match each goal of the solving process with the specific action described in the standard procedure for this equation.
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A business analyst is using the equation 7x + 5 = 6x + 2 to model the cost equilibrium between two different service providers. After solving the equation and determining that the solution is x = -3, the analyst must perform a 'Check by substitution' to verify the result. Which of the following equations correctly represents the first step of this verification procedure?
A retail analyst is verifying the solution to a cost-comparison model represented by the equation 7x + 5 = 6x + 2. After determining that the solution is x = -3, the analyst performs a check by substituting this value back into the original equation. According to the standard verification procedure, what numerical value results on both sides of the equation to confirm the balance?