SOLUTION: Solve the following system of equations using substitution or elimination 3x+2y=-1 X-4y=3

Algebra ->  Linear-equations -> SOLUTION: Solve the following system of equations using substitution or elimination 3x+2y=-1 X-4y=3      Log On


   

Question 830968: Solve the following system of equations using substitution or elimination
3x+2y=-1
X-4y=3
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
1.3x%2B2y=-1
2.x-4y=3
Mutiply eq. 1 by 2 and add to eq. 2,
6x%2B4y%2Bx-4y=-2%2B3
7x=1
highlight%28x=1%2F7%29
Then use either equation to solve for x
2y=-1-3x
2y=-1-3%281%2F7%29
2y=-7%2F7-3%2F7
2y=-10%2F7
highlight%28y=-5%2F7%29