-9+3(2r-1)=-18

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Solution for -9+3(2r-1)=-18 equation:


Simplifying
-9 + 3(2r + -1) = -18

Reorder the terms:
-9 + 3(-1 + 2r) = -18
-9 + (-1 * 3 + 2r * 3) = -18
-9 + (-3 + 6r) = -18

Combine like terms: -9 + -3 = -12
-12 + 6r = -18

Solving
-12 + 6r = -18

Solving for variable 'r'.

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

Add '12' to each side of the equation.
-12 + 12 + 6r = -18 + 12

Combine like terms: -12 + 12 = 0
0 + 6r = -18 + 12
6r = -18 + 12

Combine like terms: -18 + 12 = -6
6r = -6

Divide each side by '6'.
r = -1

Simplifying
r = -1

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