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2t-6t+9-12t=2(4t-7.5)
We move all terms to the left:
2t-6t+9-12t-(2(4t-7.5))=0
We add all the numbers together, and all the variables
-16t-(2(4t-7.5))+9=0
We calculate terms in parentheses: -(2(4t-7.5)), so:We get rid of parentheses
2(4t-7.5)
We multiply parentheses
8t-15
Back to the equation:
-(8t-15)
-16t-8t+15+9=0
We add all the numbers together, and all the variables
-24t+24=0
We move all terms containing t to the left, all other terms to the right
-24t=-24
t=-24/-24
t=1
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