-9r-r+10r+2r=20

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Solution for -9r-r+10r+2r=20 equation: 


Simplifying
-9r + -1r + 10r + 2r = 20

Combine like terms: -9r + -1r = -10r
-10r + 10r + 2r = 20

Combine like terms: -10r + 10r = 0
0 + 2r = 20
2r = 20

Solving
2r = 20

Solving for variable 'r'.

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

Divide each side by '2'.
r = 10

Simplifying
r = 10

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