19+f=-20-2f

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Solution for 19+f=-20-2f equation: 



19+f=-20-2f

We move all terms to the left:

19+f-(-20-2f)=0

We add all the numbers together, and all the variables

f-(-2f-20)+19=0

We get rid of parentheses

f+2f+20+19=0

We add all the numbers together, and all the variables

3f+39=0

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

3f=-39

f=-39/3

f=-13

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