Question

resolva o sistema!

5x-y = 4
2x-y = -5

Answer 1

5x-y=4

2x-y=-5 ×(-1)

Explicação passo-a-passo:

5x-y=4

-2x+y=5

3x=9

x=9/3

x=3

2x-y=-5

2×3-y=-5

6-y=-5

-y=-5-6

-y=-11 ×(-1)

y=11

S:(3;11)