8r+7r=90

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Solution for 8r+7r=90 equation: 


Simplifying
8r + 7r = 90

Combine like terms: 8r + 7r = 15r
15r = 90

Solving
15r = 90

Solving for variable 'r'.

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

Divide each side by '15'.
r = 6

Simplifying
r = 6

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