20+9t=-20-20-t

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Solution for 20+9t=-20-20-t equation: 



20+9t=-20-20-t

We move all terms to the left:

20+9t-(-20-20-t)=0

We add all the numbers together, and all the variables

9t-(-1t-40)+20=0

We get rid of parentheses

9t+1t+40+20=0

We add all the numbers together, and all the variables

10t+60=0

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

10t=-60

t=-60/10

t=-6

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