Question

2) Temos que o valor de y é igual a -3, resolva a equação -3x +5y = -6 e encontre o valor de x.

Answer 1

$\Large\boxed{\begin{array}{l}\sf-3x+5y=-6\\\sf -3x+5\cdot(-3)=-6\\\sf -3x-15=-6\\\sf -3x=15-6\\\sf -3x=9\cdot(-1)\\\sf 3x=-9\\\sf x=-\dfrac{9}{3}\\\\\sf \red{x=-3}\blue{\checkmark}\end{array}}$