7r-5r+r+2r=20

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Solution for 7r-5r+r+2r=20 equation: 


Simplifying
7r + -5r + r + 2r = 20

Combine like terms: 7r + -5r = 2r
2r + r + 2r = 20

Combine like terms: 2r + r = 3r
3r + 2r = 20

Combine like terms: 3r + 2r = 5r
5r = 20

Solving
5r = 20

Solving for variable 'r'.

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

Divide each side by '5'.
r = 4

Simplifying
r = 4

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