Question

Resolva o sistema.
4x + y = 2
6x - 2y = 3

a) 1/2 e 0
b) 1/6 e -1
c) 1/2 e -2
d) 1/3 e -1/2
e) 1/2 e 1/3

Answer 1

Explicação passo-a-passo:

4x + y = 2

6x - 2y = 3

y = 2 - 4x

6x - 2(2 - 4x) = 3

6x - 4 + 8x = 3

14x - 4 = 3

14x = 3 + 4

14x = 7

x = 7/14

x = 1/2

y = 2 - 4 . 1/2

y = 2 - 2

y = 0

Alternativa a