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300=400(2^-t/2)
We move all terms to the left:
300-(400(2^-t/2))=0
We multiply all the terms by the denominator
-(400(2^-t+300*2))=0
We calculate terms in parentheses: -(400(2^-t+300*2)), so:We get rid of parentheses
400(2^-t+300*2)
We multiply parentheses
-400t+240000+
We add all the numbers together, and all the variables
-400t
Back to the equation:
-(-400t)
400t=0
t=0/400
t=0
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