r-8=5r

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Solution for r-8=5r equation:


Simplifying
r + -8 = 5r

Reorder the terms:
-8 + r = 5r

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

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

Combine like terms: 5r + -5r = 0
-8 + -4r = 0

Add '8' to each side of the equation.
-8 + 8 + -4r = 0 + 8

Combine like terms: -8 + 8 = 0
0 + -4r = 0 + 8
-4r = 0 + 8

Combine like terms: 0 + 8 = 8
-4r = 8

Divide each side by '-4'.
r = -2

Simplifying
r = -2

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