-2(-8r-7)=-20-r

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Solution for -2(-8r-7)=-20-r equation:


Simplifying
-2(-8r + -7) = -20 + -1r

Reorder the terms:
-2(-7 + -8r) = -20 + -1r
(-7 * -2 + -8r * -2) = -20 + -1r
(14 + 16r) = -20 + -1r

Solving
14 + 16r = -20 + -1r

Solving for variable 'r'.

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

Add 'r' to each side of the equation.
14 + 16r + r = -20 + -1r + r

Combine like terms: 16r + r = 17r
14 + 17r = -20 + -1r + r

Combine like terms: -1r + r = 0
14 + 17r = -20 + 0
14 + 17r = -20

Add '-14' to each side of the equation.
14 + -14 + 17r = -20 + -14

Combine like terms: 14 + -14 = 0
0 + 17r = -20 + -14
17r = -20 + -14

Combine like terms: -20 + -14 = -34
17r = -34

Divide each side by '17'.
r = -2

Simplifying
r = -2

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