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8t=42+5t
We move all terms to the left:
8t-(42+5t)=0
We add all the numbers together, and all the variables
8t-(5t+42)=0
We get rid of parentheses
8t-5t-42=0
We add all the numbers together, and all the variables
3t-42=0
We move all terms containing t to the left, all other terms to the right
3t=42
t=42/3
t=14
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