8r-8=r-20+4r

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Solution for 8r-8=r-20+4r equation:


Simplifying
8r + -8 = r + -20 + 4r

Reorder the terms:
-8 + 8r = r + -20 + 4r

Reorder the terms:
-8 + 8r = -20 + r + 4r

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

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

Combine like terms: 8r + -5r = 3r
-8 + 3r = -20 + 5r + -5r

Combine like terms: 5r + -5r = 0
-8 + 3r = -20 + 0
-8 + 3r = -20

Add '8' to each side of the equation.
-8 + 8 + 3r = -20 + 8

Combine like terms: -8 + 8 = 0
0 + 3r = -20 + 8
3r = -20 + 8

Combine like terms: -20 + 8 = -12
3r = -12

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

Simplifying
r = -4

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