How do you solve the following linear system: y = - 3x + 8, 2x + y = 15 ?
1 Answer
Nov 14, 2015
x=-7
y=29
Explanation:
y=-3x+8 --------------------(1)
2x+y=15 ---------------------(2)
Substitute >
2x+(-3x+8)=15
2x-3x+8=15
-x=15-8=7
x=-7
Put
y = -3(-7)+8
y =21+8=29
y=29
