-2=-5+10+21t

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Solution for -2=-5+10+21t equation: 



-2=-5+10+21t

We move all terms to the left:

-2-(-5+10+21t)=0

We add all the numbers together, and all the variables

-(21t+5)-2=0

We get rid of parentheses

-21t-5-2=0

We add all the numbers together, and all the variables

-21t-7=0

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

-21t=7

t=7/-21

t=-1/3

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