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42=18t+4(t/5)
We move all terms to the left:
42-(18t+4(t/5))=0
We add all the numbers together, and all the variables
-(18t+4(+t/5))+42=0
We multiply all the terms by the denominator
-(18t+4(+t+42*5))=0
We calculate terms in parentheses: -(18t+4(+t+42*5)), so:We get rid of parentheses
18t+4(+t+42*5)
We add all the numbers together, and all the variables
18t+4(t+210)
We multiply parentheses
18t+4t+840
We add all the numbers together, and all the variables
22t+840
Back to the equation:
-(22t+840)
-22t-840=0
We move all terms containing t to the left, all other terms to the right
-22t=840
t=840/-22
t=-38+2/11
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