Question

{2×+y=30
{x+y=20 precisando pra hj.

Answer 1

X = 10

Y= 10

2X = 2 vezes 10 = 20

2X = 2 vezes 10 = 20

20 + y = 20 + 10 = 30

Answer 2

{2x+y=30 ×(-1)

{X+y=20

+{-2x-y = -30

{X+y = 20

-x = -10

X = 10

X+ y = 20

10 + y = 20

Y = 20 - 10

Y = 10

X = 10

Y =10