-18=-2r

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Solution for -18=-2r equation:


Simplifying
-18 = -2r

Solving
-18 = -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 + 2r = -2r + 2r

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

Add '18' to each side of the equation.
-18 + 18 + 2r = 0 + 18

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

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

Divide each side by '2'.
r = 9

Simplifying
r = 9

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