7f+21+9=5f-10-3f

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Solution for 7f+21+9=5f-10-3f equation: 



7f+21+9=5f-10-3f

We move all terms to the left:

7f+21+9-(5f-10-3f)=0

We add all the numbers together, and all the variables

7f-(2f-10)+21+9=0

We add all the numbers together, and all the variables

7f-(2f-10)+30=0

We get rid of parentheses

7f-2f+10+30=0

We add all the numbers together, and all the variables

5f+40=0

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

5f=-40

f=-40/5

f=-8

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