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-28=21t-6-8-14t
We move all terms to the left:
-28-(21t-6-8-14t)=0
We add all the numbers together, and all the variables
-(7t-14)-28=0
We get rid of parentheses
-7t+14-28=0
We add all the numbers together, and all the variables
-7t-14=0
We move all terms containing t to the left, all other terms to the right
-7t=14
t=14/-7
t=-2
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