20=13+-t

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Solution for 20=13+-t equation:



20=13+-t
We move all terms to the left:
20-(13+-t)=0
We add all the numbers together, and all the variables
-(-1t)+20=0
We get rid of parentheses
1t+20=0
We add all the numbers together, and all the variables
t+20=0
We move all terms containing t to the left, all other terms to the right
t=-20

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