10r-20=2r+12

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


Simplifying
10r + -20 = 2r + 12

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

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

Solving
-20 + 10r = 12 + 2r

Solving for variable 'r'.

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

Add '-2r' to each side of the equation.
-20 + 10r + -2r = 12 + 2r + -2r

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

Combine like terms: 2r + -2r = 0
-20 + 8r = 12 + 0
-20 + 8r = 12

Add '20' to each side of the equation.
-20 + 20 + 8r = 12 + 20

Combine like terms: -20 + 20 = 0
0 + 8r = 12 + 20
8r = 12 + 20

Combine like terms: 12 + 20 = 32
8r = 32

Divide each side by '8'.
r = 4

Simplifying
r = 4

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