(-8-r)+(2r-4)=

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Solution for (-8-r)+(2r-4)= equation:


Simplifying
(-8 + -1r) + (2r + -4) = 0

Remove parenthesis around (-8 + -1r)
-8 + -1r + (2r + -4) = 0

Reorder the terms:
-8 + -1r + (-4 + 2r) = 0

Remove parenthesis around (-4 + 2r)
-8 + -1r + -4 + 2r = 0

Reorder the terms:
-8 + -4 + -1r + 2r = 0

Combine like terms: -8 + -4 = -12
-12 + -1r + 2r = 0

Combine like terms: -1r + 2r = 1r
-12 + 1r = 0

Solving
-12 + 1r = 0

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 + 1r = 0 + 12

Combine like terms: -12 + 12 = 0
0 + 1r = 0 + 12
1r = 0 + 12

Combine like terms: 0 + 12 = 12
1r = 12

Divide each side by '1'.
r = 12

Simplifying
r = 12

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