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142=3t-8
We move all terms to the left:
142-(3t-8)=0
We get rid of parentheses
-3t+8+142=0
We add all the numbers together, and all the variables
-3t+150=0
We move all terms containing t to the left, all other terms to the right
-3t=-150
t=-150/-3
t=+50
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