3(4r-3)=87

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Solution for 3(4r-3)=87 equation: 


Simplifying
3(4r + -3) = 87

Reorder the terms:
3(-3 + 4r) = 87
(-3 * 3 + 4r * 3) = 87
(-9 + 12r) = 87

Solving
-9 + 12r = 87

Solving for variable 'r'.

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

Add '9' to each side of the equation.
-9 + 9 + 12r = 87 + 9

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

Combine like terms: 87 + 9 = 96
12r = 96

Divide each side by '12'.
r = 8

Simplifying
r = 8

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