7t+21=9t-36

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Solution for 7t+21=9t-36 equation: 



7t+21=9t-36

We move all terms to the left:

7t+21-(9t-36)=0

We get rid of parentheses

7t-9t+36+21=0

We add all the numbers together, and all the variables

-2t+57=0

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

-2t=-57

t=-57/-2

t=28+1/2

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