3r+18=12r-36

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Solution for 3r+18=12r-36 equation:


Simplifying
3r + 18 = 12r + -36

Reorder the terms:
18 + 3r = 12r + -36

Reorder the terms:
18 + 3r = -36 + 12r

Solving
18 + 3r = -36 + 12r

Solving for variable 'r'.

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

Add '-12r' to each side of the equation.
18 + 3r + -12r = -36 + 12r + -12r

Combine like terms: 3r + -12r = -9r
18 + -9r = -36 + 12r + -12r

Combine like terms: 12r + -12r = 0
18 + -9r = -36 + 0
18 + -9r = -36

Add '-18' to each side of the equation.
18 + -18 + -9r = -36 + -18

Combine like terms: 18 + -18 = 0
0 + -9r = -36 + -18
-9r = -36 + -18

Combine like terms: -36 + -18 = -54
-9r = -54

Divide each side by '-9'.
r = 6

Simplifying
r = 6

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