How do you solve 3x - y = -6 and x + y = 2?
1 Answer
Sep 6, 2015
x = - 1
y = 3
Explanation:
3x - y + - 6 ------------------(1)
x + y = 2 ---------------------(2)
Solve equation (2) for y
y = 2 - x
Substitute y = 2 - x in the equation (2)
3x - (2 - x) = - 6
3x - 2 +x = - 6
4x = - 6 + 2
x = - 1
Substitute x = - 1 in equation (1)
- 1 + y = 2
y = 2 + 1
y = 3
