9r+90=900

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Solution for 9r+90=900 equation: 


Simplifying
9r + 90 = 900

Reorder the terms:
90 + 9r = 900

Solving
90 + 9r = 900

Solving for variable 'r'.

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

Add '-90' to each side of the equation.
90 + -90 + 9r = 900 + -90

Combine like terms: 90 + -90 = 0
0 + 9r = 900 + -90
9r = 900 + -90

Combine like terms: 900 + -90 = 810
9r = 810

Divide each side by '9'.
r = 90

Simplifying
r = 90

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