Question

If 6x - 3y = 30 and 4x = 2 - y then find x + y.

Answer 1

linear system

finding the unknown variables. ..

to find x and y, here are the ways:
1. substitution method
2.elimination method
3.graphing method
4.discriminant

after it, since the question is find the value of (x+y), after getting the value of x and y usinf the above ways, add the value of it. In that way you gonna find the value of x and y.