Which expression is equivalent to 4x – 7 – 4y + 18 – x – y? A. 4x – 4y + 11 B. 3x – 5y + 11 C. 5x – 3y + 11 D. –2xy + 11

Respuesta :

Multiply the first equation by -4, to set up the x-coefficients to cancel. Take the value for y and substitute it back into either one of the original equations. Solution: In this example, we will multiply the first row by -3 and the second row by 2; then we will add down as before.   hpe it helps

the answer is B. 3x-5y+11

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