Solving by Elimination
To solve the system by elimination, notice that each given algebraic equation represents a relationship between only two of the three variables. First, select a pair of equations and manipulate them to eliminate a shared variable. For example, multiplying the second equation by yields . Adding this resulting statement to the initial first equation algebraically eliminates the variable , generating . Pairing this derived statement with the third original equation creates a simplified two-variable system: . To solve for , multiply the second equation by to obtain and add it to the first to cleanly eliminate , yielding , which means . Sequentially substituting back into the third equation calculates . Finally, inserting the initial found value into the first equation allows for solving the remaining variable, resulting in . After verifying these substituted parameters independently against all three original statements, the absolute solution reliably forms the ordered triple .
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Ch.4 Systems of Linear Equations - Intermediate Algebra @ OpenStax
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Solving by Elimination
Solving by Elimination
Solving by Elimination
Solving by Elimination
Solving by Elimination
Solving Applications Using Systems of Linear Equations with Three Variables
Solving by Elimination