3[f-12]=15

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Solution for 3[f-12]=15 equation: 


Simplifying
3[f + -12] = 15

Reorder the terms:
3[-12 + f] = 15
[-12 * 3 + f * 3] = 15
[-36 + 3f] = 15

Solving
-36 + 3f = 15

Solving for variable 'f'.

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

Add '36' to each side of the equation.
-36 + 36 + 3f = 15 + 36

Combine like terms: -36 + 36 = 0
0 + 3f = 15 + 36
3f = 15 + 36

Combine like terms: 15 + 36 = 51
3f = 51

Divide each side by '3'.
f = 17

Simplifying
f = 17

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