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f=1/2(59)+21
We move all terms to the left:
f-(1/2(59)+21)=0
We get rid of parentheses
f-21-1/259=0
We multiply all the terms by the denominator
f*259-1-21*259=0
We add all the numbers together, and all the variables
f*259-5440=0
Wy multiply elements
259f-5440=0
We move all terms containing f to the left, all other terms to the right
259f=5440
f=5440/259
f=21+1/259
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