15r-15r+4r-3r+r=20

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Solution for 15r-15r+4r-3r+r=20 equation: 


Simplifying
15r + -15r + 4r + -3r + r = 20

Combine like terms: 15r + -15r = 0
0 + 4r + -3r + r = 20
4r + -3r + r = 20

Combine like terms: 4r + -3r = 1r
1r + r = 20

Combine like terms: 1r + r = 2r
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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