-1=9t-90

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Solution for -1=9t-90 equation: 



-1=9t-90

We move all terms to the left:

-1-(9t-90)=0

We get rid of parentheses

-9t+90-1=0

We add all the numbers together, and all the variables

-9t+89=0

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

-9t=-89

t=-89/-9

t=9+8/9

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