4r+12-2=9r

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Solution for 4r+12-2=9r equation: 


Simplifying
4r + 12 + -2 = 9r

Reorder the terms:
12 + -2 + 4r = 9r

Combine like terms: 12 + -2 = 10
10 + 4r = 9r

Solving
10 + 4r = 9r

Solving for variable 'r'.

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

Add '-9r' to each side of the equation.
10 + 4r + -9r = 9r + -9r

Combine like terms: 4r + -9r = -5r
10 + -5r = 9r + -9r

Combine like terms: 9r + -9r = 0
10 + -5r = 0

Add '-10' to each side of the equation.
10 + -10 + -5r = 0 + -10

Combine like terms: 10 + -10 = 0
0 + -5r = 0 + -10
-5r = 0 + -10

Combine like terms: 0 + -10 = -10
-5r = -10

Divide each side by '-5'.
r = 2

Simplifying
r = 2

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