SOLUTION: What is the solution for r+7=3r? With an explanation.

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Question 787842: What is the solution for r+7=3r?
With an explanation.
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
r%2B7=3r Start with the given equation.


r=3r-7 Subtract 7 from both sides.


r-3r=-7 Subtract 3r from both sides.


-2r=-7 Combine like terms on the left side.


r=%28-7%29%2F%28-2%29 Divide both sides by -2 to isolate r.


r=7%2F2 Reduce.


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Answer:

So the solution is r=7%2F2