Question

equaçao de 1 grau sabendo que x e igual a nove 8x menos 6y e igual a 30

Answer 1

x = 8

8x-6y=30
8(9)-6y=30
72-6y=30
-6y=30-72
-6y=-42 (-1)
6y=42
y=42 ÷ 6
y= 7