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(t+4)-9=-7
We move all terms to the left:
(t+4)-9-(-7)=0
We add all the numbers together, and all the variables
(t+4)-2=0
We get rid of parentheses
t+4-2=0
We add all the numbers together, and all the variables
t+2=0
We move all terms containing t to the left, all other terms to the right
t=-2
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