7=-4.2f

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Solution for 7=-4.2f equation: 



7=-4.2f

We move all terms to the left:

7-(-4.2f)=0

We get rid of parentheses

4.2f+7=0

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

4.2f=-7

f=-7/4.2

f=-1+1/1.5

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