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80=110-30t
We move all terms to the left:
80-(110-30t)=0
We add all the numbers together, and all the variables
-(-30t+110)+80=0
We get rid of parentheses
30t-110+80=0
We add all the numbers together, and all the variables
30t-30=0
We move all terms containing t to the left, all other terms to the right
30t=30
t=30/30
t=1
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