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28=4(t-86)
We move all terms to the left:
28-(4(t-86))=0
We calculate terms in parentheses: -(4(t-86)), so:We get rid of parentheses
4(t-86)
We multiply parentheses
4t-344
Back to the equation:
-(4t-344)
-4t+344+28=0
We add all the numbers together, and all the variables
-4t+372=0
We move all terms containing t to the left, all other terms to the right
-4t=-372
t=-372/-4
t=+93
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