8r-20=7+5r

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Solution for 8r-20=7+5r equation:


Simplifying
8r + -20 = 7 + 5r

Reorder the terms:
-20 + 8r = 7 + 5r

Solving
-20 + 8r = 7 + 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 + 8r + -5r = 7 + 5r + -5r

Combine like terms: 8r + -5r = 3r
-20 + 3r = 7 + 5r + -5r

Combine like terms: 5r + -5r = 0
-20 + 3r = 7 + 0
-20 + 3r = 7

Add '20' to each side of the equation.
-20 + 20 + 3r = 7 + 20

Combine like terms: -20 + 20 = 0
0 + 3r = 7 + 20
3r = 7 + 20

Combine like terms: 7 + 20 = 27
3r = 27

Divide each side by '3'.
r = 9

Simplifying
r = 9

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