Question

5 x - 4y = 12
2x - 4y = 6

Answer 1

Resposta:

x=2; y=-0,5

Explicação passo a passo:

$5x=12+4y\\x=\frac{4y+12}{5}$

$2*\frac{4y+12}{5} -4y = 6\\8y+24-20y=30\\-12y=6\\y=-\frac{1}{2\\}$

$x=\frac{4(-1/2)+12}{5} \\x=\frac{-2+12}{5}\\x=\frac{10}{5}\\x=2$