Question

B)2x+6y=30
2x+y=10

C)4x-2y=24
3x+2y=13

D)2x+7y=17
10x-2y=-26

Answer 1

B) x=3 e y=4

2x+6y=30

2x+y=10 .(-6). _____ 2.3+y=10.

-12x-6y=-60. ______ 6+y=10.

2x+6y=30. _______ y=10-6

-10x=-30 .(-1). _______ y=4

10x=30

x=30/10

x=3

Consegui resolver esse

Espero ter ajudado