Solve for r 9r-8=13+2r

Math
9r-8=13+2r
Move all terms containing r to the left side of the equation.
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Subtract 2r from both sides of the equation.
9r-8-2r=13
Subtract 2r from 9r.
7r-8=13
7r-8=13
Move all terms not containing r to the right side of the equation.
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Add 8 to both sides of the equation.
7r=13+8
Add 13 and 8.
7r=21
7r=21
Divide each term by 7 and simplify.
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Divide each term in 7r=21 by 7.
7r7=217
Cancel the common factor of 7.
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Cancel the common factor.
7r7=217
Divide r by 1.
r=217
r=217
Divide 21 by 7.
r=3
r=3
Solve for r 9r-8=13+2r

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