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6(t-9)=-42
We move all terms to the left:
6(t-9)-(-42)=0
We add all the numbers together, and all the variables
6(t-9)+42=0
We multiply parentheses
6t-54+42=0
We add all the numbers together, and all the variables
6t-12=0
We move all terms containing t to the left, all other terms to the right
6t=12
t=12/6
t=2
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