-9(2+r)=18

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Solution for -9(2+r)=18 equation: 


Simplifying
-9(2 + r) = 18
(2 * -9 + r * -9) = 18
(-18 + -9r) = 18

Solving
-18 + -9r = 18

Solving for variable 'r'.

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

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

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

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

Divide each side by '-9'.
r = -4

Simplifying
r = -4

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