-18r-18=-3(5r+13)

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Solution for -18r-18=-3(5r+13) equation:


Simplifying
-18r + -18 = -3(5r + 13)

Reorder the terms:
-18 + -18r = -3(5r + 13)

Reorder the terms:
-18 + -18r = -3(13 + 5r)
-18 + -18r = (13 * -3 + 5r * -3)
-18 + -18r = (-39 + -15r)

Solving
-18 + -18r = -39 + -15r

Solving for variable 'r'.

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

Add '15r' to each side of the equation.
-18 + -18r + 15r = -39 + -15r + 15r

Combine like terms: -18r + 15r = -3r
-18 + -3r = -39 + -15r + 15r

Combine like terms: -15r + 15r = 0
-18 + -3r = -39 + 0
-18 + -3r = -39

Add '18' to each side of the equation.
-18 + 18 + -3r = -39 + 18

Combine like terms: -18 + 18 = 0
0 + -3r = -39 + 18
-3r = -39 + 18

Combine like terms: -39 + 18 = -21
-3r = -21

Divide each side by '-3'.
r = 7

Simplifying
r = 7

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