Question

Pelo método de adição
5x-y=4
2x-y=-5​

Answer 1

Resposta:

X= 3

Y= 17

Explicação passo-a-passo:

$5x-y=4\\2x-y=-5 *(-1)\\5x-y=4\\-2x+y=5\\3x+0y=9\\x=3\\\\2x-y=-5\\2*6-y=-5\\12-y=-5\\-y=-5-12\\-y=-17\\y=17$