10r-20+2r+12=180

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Solution for 10r-20+2r+12=180 equation:


Simplifying
10r + -20 + 2r + 12 = 180

Reorder the terms:
-20 + 12 + 10r + 2r = 180

Combine like terms: -20 + 12 = -8
-8 + 10r + 2r = 180

Combine like terms: 10r + 2r = 12r
-8 + 12r = 180

Solving
-8 + 12r = 180

Solving for variable 'r'.

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

Add '8' to each side of the equation.
-8 + 8 + 12r = 180 + 8

Combine like terms: -8 + 8 = 0
0 + 12r = 180 + 8
12r = 180 + 8

Combine like terms: 180 + 8 = 188
12r = 188

Divide each side by '12'.
r = 15.66666667

Simplifying
r = 15.66666667

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