Question

y=x-4 x/5+y=8/2 Por favor não consigo resolver

Answer 1

Resposta:

Explicação passo-a-passo:

y=x-4 (I)

$\frac{x}{5}+y=\frac{8}{2}\\\\\frac{x}{5}+y=4\\\\\frac{x}{5}=4-y\\\\x=5(4-y)\\\\x=20-5y$ (II)

Substituindo (I) em (II)

$x=20-5(x-4)\\\\x=20-5x+20\\\\x+5x=40\\\\6x=40\\\\x=\frac{40}{6}\\\\x=\frac{20}{3}$

$y=x-4\\\\y=\frac{20}{3}-4\\\\y=\frac{20-12}{3}\\\\y=\frac{8}{3}$