15=6.4+f

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Solution for 15=6.4+f equation: 



15=6.4+f

We move all terms to the left:

15-(6.4+f)=0

We add all the numbers together, and all the variables

-(f+6.4)+15=0

We get rid of parentheses

-f-6.4+15=0

We add all the numbers together, and all the variables

-1f+8.6=0

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

-f=-8.6

f=-8.6/-1

f=8+0.6/1

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