-r-20=-5r-72

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Solution for -r-20=-5r-72 equation:


Simplifying
-1r + -20 = -5r + -72

Reorder the terms:
-20 + -1r = -5r + -72

Reorder the terms:
-20 + -1r = -72 + -5r

Solving
-20 + -1r = -72 + -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.
-20 + -1r + 5r = -72 + -5r + 5r

Combine like terms: -1r + 5r = 4r
-20 + 4r = -72 + -5r + 5r

Combine like terms: -5r + 5r = 0
-20 + 4r = -72 + 0
-20 + 4r = -72

Add '20' to each side of the equation.
-20 + 20 + 4r = -72 + 20

Combine like terms: -20 + 20 = 0
0 + 4r = -72 + 20
4r = -72 + 20

Combine like terms: -72 + 20 = -52
4r = -52

Divide each side by '4'.
r = -13

Simplifying
r = -13

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