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

Question

anonymous · Answer

y = -9.5 and x = 31

anonymous · Answer

Can you please show me how you got that answer ?

anonymous · Answer

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.

anonymous · Answer

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

anonymous · Answer

Yes thank u

anonymous · Answer

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