-3r+18=2(r-1)

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Solution for -3r+18=2(r-1) equation:


Simplifying
-3r + 18 = 2(r + -1)

Reorder the terms:
18 + -3r = 2(r + -1)

Reorder the terms:
18 + -3r = 2(-1 + r)
18 + -3r = (-1 * 2 + r * 2)
18 + -3r = (-2 + 2r)

Solving
18 + -3r = -2 + 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.
18 + -3r + -2r = -2 + 2r + -2r

Combine like terms: -3r + -2r = -5r
18 + -5r = -2 + 2r + -2r

Combine like terms: 2r + -2r = 0
18 + -5r = -2 + 0
18 + -5r = -2

Add '-18' to each side of the equation.
18 + -18 + -5r = -2 + -18

Combine like terms: 18 + -18 = 0
0 + -5r = -2 + -18
-5r = -2 + -18

Combine like terms: -2 + -18 = -20
-5r = -20

Divide each side by '-5'.
r = 4

Simplifying
r = 4

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