2x-y=17, x-y=10
1. 2x - y = 17
2. -y = -2x + 17
3. y = 2x - 17
4. x - y = 10
5. -y = -x + 10
6. y = x - 10
From equation 3 and 6, we have y = 2x - 17 = x - 10
2x - 17 = x - 10
x = 7 <<<<<
Substitute x into equation 3.
y = 2 * 7 - 17 = 14 - 17 = -3
Substitute x into equation 6.
y = 7 - 10 = -3
x is 7, y is -3