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7-(t-2)=7
We move all terms to the left:
7-(t-2)-(7)=0
We add all the numbers together, and all the variables
-(t-2)=0
We get rid of parentheses
-t+2=0
We add all the numbers together, and all the variables
-1t+2=0
We move all terms containing t to the left, all other terms to the right
-t=-2
t=-2/-1
t=+2
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