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t+129=-3t+8
We move all terms to the left:
t+129-(-3t+8)=0
We get rid of parentheses
t+3t-8+129=0
We add all the numbers together, and all the variables
4t+121=0
We move all terms containing t to the left, all other terms to the right
4t=-121
t=-121/4
t=-30+1/4
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