81=t+4

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Solution for 81=t+4 equation: 



81=t+4

We move all terms to the left:

81-(t+4)=0

We get rid of parentheses

-t-4+81=0

We add all the numbers together, and all the variables

-1t+77=0

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

-t=-77

t=-77/-1

t=+77

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