7t+21=t-3

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Solution for 7t+21=t-3 equation: 



7t+21=t-3

We move all terms to the left:

7t+21-(t-3)=0

We get rid of parentheses

7t-t+3+21=0

We add all the numbers together, and all the variables

6t+24=0

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

6t=-24

t=-24/6

t=-4

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