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Question 270712: how do i do 7r-5r+2=5r-r
Answer by Theo(13342)   (Show Source):
You can put this solution on YOUR website! equation is:
7r-5r+2=5r-r
combine like terms to get:
2r + 2 = 4r
subtract 2r from both sides of equation to get:
2 = 2r
divide both sides of equation by 2 to get r = 1
substitute in original equation to see if this is good.
original equation is:
7r-5r+2=5r-r
substitute 1 for r to get:
7 - 5 + 2 = 5 - 1 which becomes:
4 = 4 which is true, confirming that r = 1 is good.
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