18=-7t-3

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Solution for 18=-7t-3 equation: 



18=-7t-3

We move all terms to the left:

18-(-7t-3)=0

We get rid of parentheses

7t+3+18=0

We add all the numbers together, and all the variables

7t+21=0

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

7t=-21

t=-21/7

t=-3

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