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10t-11=5t+21
We move all terms to the left:
10t-11-(5t+21)=0
We get rid of parentheses
10t-5t-21-11=0
We add all the numbers together, and all the variables
5t-32=0
We move all terms containing t to the left, all other terms to the right
5t=32
t=32/5
t=6+2/5
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