Question

find the solution of this system of equations -7x+y=-20 9x-3y=36

Answer 1

Answer:

$x = -8\\ y = -36$

Step-by-step explanation:

$-7x+y=-20\\ 9x-3y=36\\ \textbf{Multiply 3 to the first equation}\\-21x + 3 y = -60\\\textbf{Use the elemination method}\\ -12x = 96\\ x = -8\\ y = -36$