4r-9=85

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Solution for 4r-9=85 equation: 


Simplifying
4r + -9 = 85

Reorder the terms:
-9 + 4r = 85

Solving
-9 + 4r = 85

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 + 4r = 85 + 9

Combine like terms: -9 + 9 = 0
0 + 4r = 85 + 9
4r = 85 + 9

Combine like terms: 85 + 9 = 94
4r = 94

Divide each side by '4'.
r = 23.5

Simplifying
r = 23.5

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