r+2=3r-18

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Solution for r+2=3r-18 equation: 


Simplifying
r + 2 = 3r + -18

Reorder the terms:
2 + r = 3r + -18

Reorder the terms:
2 + r = -18 + 3r

Solving
2 + r = -18 + 3r

Solving for variable 'r'.

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

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

Combine like terms: r + -3r = -2r
2 + -2r = -18 + 3r + -3r

Combine like terms: 3r + -3r = 0
2 + -2r = -18 + 0
2 + -2r = -18

Add '-2' to each side of the equation.
2 + -2 + -2r = -18 + -2

Combine like terms: 2 + -2 = 0
0 + -2r = -18 + -2
-2r = -18 + -2

Combine like terms: -18 + -2 = -20
-2r = -20

Divide each side by '-2'.
r = 10

Simplifying
r = 10

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