9r-7r=20

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Solution for 9r-7r=20 equation: 


Simplifying
9r + -7r = 20

Combine like terms: 9r + -7r = 2r
2r = 20

Solving
2r = 20

Solving for variable 'r'.

Move all terms containing r to the left, all other terms to the right.

Divide each side by '2'.
r = 10

Simplifying
r = 10

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