Question

me ajudem a resolver isso pls

2x+y=5
2x+8y=12

Answer 1

2x + y = 5

2x + 8y = 5

2x + y = 5

y = 5 - 2x

2x + 8(5 - 2x) = 5

2x + 40 - 16x = 5

40 - 5 = 16x - 2x

35 = 14x

35/14 = x

5/2 = x

2x + y = 5

2 * 5/2 + y = 5

10/5 + y = 5

2 + y = 5

y = 5 - 2

y = 3