9(t-90)=81

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Solution for 9(t-90)=81 equation: 



9(t-90)=81

We move all terms to the left:

9(t-90)-(81)=0

We multiply parentheses

9t-810-81=0

We add all the numbers together, and all the variables

9t-891=0

We move all terms containing t to the left, all other terms to the right

9t=891

t=891/9

t=99

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