SOLUTION: if 6x-3y=30 and 4x=2-y then find x+y.

Question 30571: if 6x-3y=30 and 4x=2-y then find x+y.
Answer by Cintchr(481) (Show Source): You can put this solution on YOUR website!
and then find x+y
get the second equation in y=mx+b format
add y to both sides
subtract 4x from both sides
Plug this into the first equation
distribute the -3
Add 6 to both sides
Combine like terms
divide by 18

Plug this back into the second equation

subtract 2 from both sides
negative variables is a no no .... change all the signs

Plug x and y into x+y

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