20-6f=-20-8f

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Solution for 20-6f=-20-8f equation: 



20-6f=-20-8f

We move all terms to the left:

20-6f-(-20-8f)=0

We add all the numbers together, and all the variables

-6f-(-8f-20)+20=0

We get rid of parentheses

-6f+8f+20+20=0

We add all the numbers together, and all the variables

2f+40=0

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

2f=-40

f=-40/2

f=-20

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