7r=8r+9

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Solution for 7r=8r+9 equation: 


Simplifying
7r = 8r + 9

Reorder the terms:
7r = 9 + 8r

Solving
7r = 9 + 8r

Solving for variable 'r'.

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

Add '-8r' to each side of the equation.
7r + -8r = 9 + 8r + -8r

Combine like terms: 7r + -8r = -1r
-1r = 9 + 8r + -8r

Combine like terms: 8r + -8r = 0
-1r = 9 + 0
-1r = 9

Divide each side by '-1'.
r = -9

Simplifying
r = -9

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