3r+6(r-2)=87

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Solution for 3r+6(r-2)=87 equation:


Simplifying
3r + 6(r + -2) = 87

Reorder the terms:
3r + 6(-2 + r) = 87
3r + (-2 * 6 + r * 6) = 87
3r + (-12 + 6r) = 87

Reorder the terms:
-12 + 3r + 6r = 87

Combine like terms: 3r + 6r = 9r
-12 + 9r = 87

Solving
-12 + 9r = 87

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 = 87 + 12

Combine like terms: -12 + 12 = 0
0 + 9r = 87 + 12
9r = 87 + 12

Combine like terms: 87 + 12 = 99
9r = 99

Divide each side by '9'.
r = 11

Simplifying
r = 11

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