20=t+7

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Solution for 20=t+7 equation: 



20=t+7

We move all terms to the left:

20-(t+7)=0

We get rid of parentheses

-t-7+20=0

We add all the numbers together, and all the variables

-1t+13=0

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

-t=-13

t=-13/-1

t=+13

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