7r+3r-8=9+2r

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Solution for 7r+3r-8=9+2r equation:


Simplifying
7r + 3r + -8 = 9 + 2r

Reorder the terms:
-8 + 7r + 3r = 9 + 2r

Combine like terms: 7r + 3r = 10r
-8 + 10r = 9 + 2r

Solving
-8 + 10r = 9 + 2r

Solving for variable 'r'.

Move all terms containing r to the left, all other terms to the right.

Add '-2r' to each side of the equation.
-8 + 10r + -2r = 9 + 2r + -2r

Combine like terms: 10r + -2r = 8r
-8 + 8r = 9 + 2r + -2r

Combine like terms: 2r + -2r = 0
-8 + 8r = 9 + 0
-8 + 8r = 9

Add '8' to each side of the equation.
-8 + 8 + 8r = 9 + 8

Combine like terms: -8 + 8 = 0
0 + 8r = 9 + 8
8r = 9 + 8

Combine like terms: 9 + 8 = 17
8r = 17

Divide each side by '8'.
r = 2.125

Simplifying
r = 2.125

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