Question

4x+y = 14
2x – 3y = -28​

Answer 1

Resposta:

{4x + y = 14 y = 14 - 4x

{2x - 3y = -28

2x - 3(14 - 4x) = -28

2x - 42 + 12x = -28

2x + 12x = -28 + 42

14x = 14

x = 14 / 14

x = 1

y = 14 - 4x

y = 14 - 4 × 1

y = 14 - 4

y = 10