If the coefficients of a variable are the same in each equation in a system you add together the two equations when you solve by the method of elimination.

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Quizplus · Accepted Answer

When using the method of elimination to solve a system of equations, if the coefficients of a variable are the same in each equation, you typically subtract one equation from the other to eliminate that variable. Adding them would not eliminate the variable.

If the Coefficients of a Variable Are the Same in Each