3(8+f)-7f=-12

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Solution for 3(8+f)-7f=-12 equation: 



3(8+f)-7f=-12

We move all terms to the left:

3(8+f)-7f-(-12)=0

We add all the numbers together, and all the variables

3(f+8)-7f-(-12)=0

We add all the numbers together, and all the variables

-7f+3(f+8)+12=0

We multiply parentheses

-7f+3f+24+12=0

We add all the numbers together, and all the variables

-4f+36=0

We move all terms containing f to the left, all other terms to the right

-4f=-36

f=-36/-4

f=+9

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