-3(r+1)-r=9

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


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

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

Combine like terms: -3r + -1r = -4r
-3 + -4r = 9

Solving
-3 + -4r = 9

Solving for variable 'r'.

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

Add '3' to each side of the equation.
-3 + 3 + -4r = 9 + 3

Combine like terms: -3 + 3 = 0
0 + -4r = 9 + 3
-4r = 9 + 3

Combine like terms: 9 + 3 = 12
-4r = 12

Divide each side by '-4'.
r = -3

Simplifying
r = -3

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