6r+2(r+6)=39-r

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Solution for 6r+2(r+6)=39-r equation:


Simplifying
6r + 2(r + 6) = 39 + -1r

Reorder the terms:
6r + 2(6 + r) = 39 + -1r
6r + (6 * 2 + r * 2) = 39 + -1r
6r + (12 + 2r) = 39 + -1r

Reorder the terms:
12 + 6r + 2r = 39 + -1r

Combine like terms: 6r + 2r = 8r
12 + 8r = 39 + -1r

Solving
12 + 8r = 39 + -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.
12 + 8r + r = 39 + -1r + r

Combine like terms: 8r + r = 9r
12 + 9r = 39 + -1r + r

Combine like terms: -1r + r = 0
12 + 9r = 39 + 0
12 + 9r = 39

Add '-12' to each side of the equation.
12 + -12 + 9r = 39 + -12

Combine like terms: 12 + -12 = 0
0 + 9r = 39 + -12
9r = 39 + -12

Combine like terms: 39 + -12 = 27
9r = 27

Divide each side by '9'.
r = 3

Simplifying
r = 3

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