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72=-9(7f-8)+63f
We move all terms to the left:
72-(-9(7f-8)+63f)=0
We calculate terms in parentheses: -(-9(7f-8)+63f), so:We add all the numbers together, and all the variables
-9(7f-8)+63f
We add all the numbers together, and all the variables
63f-9(7f-8)
We multiply parentheses
63f-63f+72
We add all the numbers together, and all the variables
72
Back to the equation:
-(72)
=0
f=0/1
f=0
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