- 2x - 3y = 40
- 2x - 3y +3y= 40+3y
-2x=40+3y
-2x/-2=40+3y/-2
x=20-1.5y
4x - 3y = 10
4(20-1.5y) - 3y = 10
4(20) (4)(-1.5y) - 3y = 10
80-6y - 3y = 10
80-9y = 10
80-9y-80 = 10-80
-9y=-70
-9y/-9=-70/-9
y=7.78
x=20-1.5y
x=20-1.5(7.78)
x=20-11.67=8.33