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-6(t-80)=-78
We move all terms to the left:
-6(t-80)-(-78)=0
We add all the numbers together, and all the variables
-6(t-80)+78=0
We multiply parentheses
-6t+480+78=0
We add all the numbers together, and all the variables
-6t+558=0
We move all terms containing t to the left, all other terms to the right
-6t=-558
t=-558/-6
t=+93
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