r+r+3+9r=51-r

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Solution for r+r+3+9r=51-r equation:


Simplifying
r + r + 3 + 9r = 51 + -1r

Reorder the terms:
3 + r + r + 9r = 51 + -1r

Combine like terms: r + r = 2r
3 + 2r + 9r = 51 + -1r

Combine like terms: 2r + 9r = 11r
3 + 11r = 51 + -1r

Solving
3 + 11r = 51 + -1r

Solving for variable 'r'.

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

Add 'r' to each side of the equation.
3 + 11r + r = 51 + -1r + r

Combine like terms: 11r + r = 12r
3 + 12r = 51 + -1r + r

Combine like terms: -1r + r = 0
3 + 12r = 51 + 0
3 + 12r = 51

Add '-3' to each side of the equation.
3 + -3 + 12r = 51 + -3

Combine like terms: 3 + -3 = 0
0 + 12r = 51 + -3
12r = 51 + -3

Combine like terms: 51 + -3 = 48
12r = 48

Divide each side by '12'.
r = 4

Simplifying
r = 4

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