How do you solve the system of equations #x= - 4# and #- 8x - 5y = - 18# by using substitution?
Y is equal to 10. For how, see the explanation.
This gets you:
Subtract 32 from both sides:
Divide both sides by negative five:
You don't need to find x, since it's already given.
There are other ways to solve this with substitution, involving adding or subtracting different things in a different order, but they all end up with the same answer.