-r+9=.15

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Solution for -r+9=.15 equation: 


Simplifying
-1r + 9 = 0.15

Reorder the terms:
9 + -1r = 0.15

Solving
9 + -1r = 0.15

Solving for variable 'r'.

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

Add '-9' to each side of the equation.
9 + -9 + -1r = 0.15 + -9

Combine like terms: 9 + -9 = 0
0 + -1r = 0.15 + -9
-1r = 0.15 + -9

Combine like terms: 0.15 + -9 = -8.85
-1r = -8.85

Divide each side by '-1'.
r = 8.85

Simplifying
r = 8.85

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