Question

What is 3x - y = -4 2x - y = -10
Using substitution

Answer 1

3x - y = -4
3x - (-10) = -4 Substitute
3x + 10 = -4 Simplify
3x = -14 Separate numbers and variables
x = -14/3 Divide

2x - y = - 10
2x - (-10) = -10 Substitute
2x + 10 = -10 Simplify
2x = -20 Separate numbers and variables
x = -10 Divide

Answer 2

3x-y=-4
-y=-3x-4
y=3x-4
2
2x-y=10
2x-(3x-4)=10
2x-3x+4=10
x=6
2x-y=-10
2(6)-y=-10
12-y=-10
-y=-22
y=22