SOLUTION: im having a very hard time figuring out how to do the substitution method the problem that im stuck on is x=5+y then the second part of the equation is 2x-3y=7 but im stuck because

Algebra ->  Coordinate Systems and Linear Equations -> SOLUTION: im having a very hard time figuring out how to do the substitution method the problem that im stuck on is x=5+y then the second part of the equation is 2x-3y=7 but im stuck because      Log On


   



Question 579194: im having a very hard time figuring out how to do the substitution method the problem that im stuck on is x=5+y then the second part of the equation is 2x-3y=7 but im stuck because i dont understand how to do it

Answer by rfer(16322) About Me  (Show Source):
You can put this solution on YOUR website!
x=5+y
2x-3y=7
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2(5+y)-3y=7
10+2y-3y=7
-y=7-10
-y=-3
y=3
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2x-3*3=7
2x-9=7
2x=7+9
2x=16
x=8
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proof
x=5+y
8=5+3