4r+13=85

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Solution for 4r+13=85 equation: 


Simplifying
4r + 13 = 85

Reorder the terms:
13 + 4r = 85

Solving
13 + 4r = 85

Solving for variable 'r'.

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

Add '-13' to each side of the equation.
13 + -13 + 4r = 85 + -13

Combine like terms: 13 + -13 = 0
0 + 4r = 85 + -13
4r = 85 + -13

Combine like terms: 85 + -13 = 72
4r = 72

Divide each side by '4'.
r = 18

Simplifying
r = 18

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