solve= - 2z + 3 + 7 z = -12
have NO clue u need help
-2z + 3 + 7z = -12
Combine like terms.
5z + 3 = -12
Subtract 3 from both sides of the equation.
5z = -12 - 3
5z = -15
Divide both sides of the equation by 5.
z = -15/5
z = -3