7(t+13)=21

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Solution for 7(t+13)=21 equation: 



7(t+13)=21

We move all terms to the left:

7(t+13)-(21)=0

We multiply parentheses

7t+91-21=0

We add all the numbers together, and all the variables

7t+70=0

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

7t=-70

t=-70/7

t=-10

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