Question

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

Answer 1

i'll do it in a minute

Answer 2

damn, my system ruined ;(((

Answer 3

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 using the above ways, add the value of it. In that way you gonna find the value of x+ y.

Answer 4

x+y= -4

Answer 5

6x - 3y = 30 and 4x = 2 - y then find x + y.
4x-2= -y
.........
y= -4x +2
....
6x-3(-4x+2)=30
..........
6x+12x -6 = 30
.............
18x - 6 = 30
...............
18x=36
.............
x= 2
...........

4x = 2 - y
......
4(2) = 2 -y
......
8 = 2 - y
.......
6 = -y
.....
y=-6
.......

x+y= -6 + 2 = -4