Question

resolva a igualdade:

(2x + y, 8) = (6, 4x + y)

Answer 1

2x + y = 6
4x + y = 8

aplicando o sistema

2x + y = 6 x(-2)
4x + y = 8

-4x - 2y = -12
4x + y = 8

-y = -4 x(-1)
y = 4

2x + y = 6
2x + 4 = 6
2x = 6 - 4
2x = 2
x = 1