Question 787842
{{{r+7=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=(-7)/(-2)}}} Divide both sides by {{{-2}}} to isolate {{{r}}}.



{{{r=7/2}}} Reduce.



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Answer:


So the solution is {{{r=7/2}}}