5r+8=20-r

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Solution for 5r+8=20-r equation:


Simplifying
5r + 8 = 20 + -1r

Reorder the terms:
8 + 5r = 20 + -1r

Solving
8 + 5r = 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.
8 + 5r + r = 20 + -1r + r

Combine like terms: 5r + r = 6r
8 + 6r = 20 + -1r + r

Combine like terms: -1r + r = 0
8 + 6r = 20 + 0
8 + 6r = 20

Add '-8' to each side of the equation.
8 + -8 + 6r = 20 + -8

Combine like terms: 8 + -8 = 0
0 + 6r = 20 + -8
6r = 20 + -8

Combine like terms: 20 + -8 = 12
6r = 12

Divide each side by '6'.
r = 2

Simplifying
r = 2

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