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91/2=t-31/2
We move all terms to the left:
91/2-(t-31/2)=0
We add all the numbers together, and all the variables
-(+t-31/2)+91/2=0
We get rid of parentheses
-t+31/2+91/2=0
We multiply all the terms by the denominator
-t*2+31+91=0
We add all the numbers together, and all the variables
-t*2+122=0
Wy multiply elements
-2t+122=0
We move all terms containing t to the left, all other terms to the right
-2t=-122
t=-122/-2
t=+61
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