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15-f=23+2f
We move all terms to the left:
15-f-(23+2f)=0
We add all the numbers together, and all the variables
-f-(2f+23)+15=0
We add all the numbers together, and all the variables
-1f-(2f+23)+15=0
We get rid of parentheses
-1f-2f-23+15=0
We add all the numbers together, and all the variables
-3f-8=0
We move all terms containing f to the left, all other terms to the right
-3f=8
f=8/-3
f=-2+2/3
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