-9(1+1r)-4=-2+2r

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Solution for -9(1+1r)-4=-2+2r equation:


Simplifying
-9(1 + 1r) + -4 = -2 + 2r
(1 * -9 + 1r * -9) + -4 = -2 + 2r
(-9 + -9r) + -4 = -2 + 2r

Reorder the terms:
-9 + -4 + -9r = -2 + 2r

Combine like terms: -9 + -4 = -13
-13 + -9r = -2 + 2r

Solving
-13 + -9r = -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.
-13 + -9r + -2r = -2 + 2r + -2r

Combine like terms: -9r + -2r = -11r
-13 + -11r = -2 + 2r + -2r

Combine like terms: 2r + -2r = 0
-13 + -11r = -2 + 0
-13 + -11r = -2

Add '13' to each side of the equation.
-13 + 13 + -11r = -2 + 13

Combine like terms: -13 + 13 = 0
0 + -11r = -2 + 13
-11r = -2 + 13

Combine like terms: -2 + 13 = 11
-11r = 11

Divide each side by '-11'.
r = -1

Simplifying
r = -1

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