Question

Solve using the subsitution method.
4x - 8y = 48 and 11x + 3y = -105.5

Answer 1

y = -9.5 and x = 31

Answer 2

Can you please show me how you got that answer ?

Answer 3

Sure! Pick either equation 1 or 2 (as I've decided to name them, they are numbered in order of appearance). I chose to solve equation 1 for x. This gave me: x = 12 + 2y. I then plugged that value for x into equation 2 such that: 11x + 3y = -105.5 becomes 11(12 +2y) + 3y = -105.5. Solve for y and you get -9.5.

Answer 4

Now if you take that value for y and plug it into equation 1, solving for x, you get 31. Make sense?

Answer 5

Yes thank u

Answer 6

Wait - there is an error in my math. X should equal -7.