SOLUTION: I have to solve each system by substitution. I under stand most of the problems and they were very easy. Some if the problems are giving me results like x=1&1/4 y=-13&3/4. None of

Algebra ->  Graphs -> SOLUTION: I have to solve each system by substitution. I under stand most of the problems and they were very easy. Some if the problems are giving me results like x=1&1/4 y=-13&3/4. None of       Log On


   



Question 740057: I have to solve each system by substitution. I under stand most of the problems and they were very easy. Some if the problems are giving me results like x=1&1/4 y=-13&3/4. None of the examples we did in class gave me answers like that. Please help! On example i am stuck on is this:
X=7-2y
2x+y=5
Thank you in advance,
Taylor

Answer by MathLover1(20849) About Me  (Show Source):
You can put this solution on YOUR website!
x=7-2y...eq.1
2x%2By=5...eq.2
________________________
x=7-2y...eq.1.substitute x in eq.2

2%287-2y%29%2By=5...eq.2...solve for y
14-4y%2By=5
14-3y=5
14-5=3y
9=3y
9%2F3=y

highlight%283=y%29
now find x
x=7-2y...eq.1
x=7-2%2A3
x=7-6
highlight%28x=1%29

check solution on a graph: