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one or both equations need to be modified before they can be combined u…

Question

one or both equations need to be modified before they can be combined using addition. select the variable to eliminate: x multiply the equation by -8x - 8y = -18 ------ -1 -------> 8x + 8y = 18 multiply the equation by 4x + y = -9 ------ -2 -------> + -8x - 2y = 18

Explanation:

Step1: Sumar las ecuaciones modificadas

Sumamos la ecuación \(8x + 8y = 18\) y \(-8x - 2y = 18\). Al sumar los términos con \(x\): \(8x + (-8x)=0\). Al sumar los términos con \(y\): \(8y+(-2y) = 6y\). Al sumar los términos constantes: \(18 + 18=36\).

Step2: Escribir la ecuación resultante

La ecuación resultante después de la suma es \(6y=36\).

Answer:

\(6y = 36\)