-4(r-2)-8r=-20-5r

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Solution for -4(r-2)-8r=-20-5r equation:


Simplifying
-4(r + -2) + -8r = -20 + -5r

Reorder the terms:
-4(-2 + r) + -8r = -20 + -5r
(-2 * -4 + r * -4) + -8r = -20 + -5r
(8 + -4r) + -8r = -20 + -5r

Combine like terms: -4r + -8r = -12r
8 + -12r = -20 + -5r

Solving
8 + -12r = -20 + -5r

Solving for variable 'r'.

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

Add '5r' to each side of the equation.
8 + -12r + 5r = -20 + -5r + 5r

Combine like terms: -12r + 5r = -7r
8 + -7r = -20 + -5r + 5r

Combine like terms: -5r + 5r = 0
8 + -7r = -20 + 0
8 + -7r = -20

Add '-8' to each side of the equation.
8 + -8 + -7r = -20 + -8

Combine like terms: 8 + -8 = 0
0 + -7r = -20 + -8
-7r = -20 + -8

Combine like terms: -20 + -8 = -28
-7r = -28

Divide each side by '-7'.
r = 4

Simplifying
r = 4

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