7r+2(r+6)=9

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Solution for 7r+2(r+6)=9 equation:


Simplifying
7r + 2(r + 6) = 9

Reorder the terms:
7r + 2(6 + r) = 9
7r + (6 * 2 + r * 2) = 9
7r + (12 + 2r) = 9

Reorder the terms:
12 + 7r + 2r = 9

Combine like terms: 7r + 2r = 9r
12 + 9r = 9

Solving
12 + 9r = 9

Solving for variable 'r'.

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

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

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

Combine like terms: 9 + -12 = -3
9r = -3

Divide each side by '9'.
r = -0.3333333333

Simplifying
r = -0.3333333333

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