21-t+5=7

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Solution for 21-t+5=7 equation: 



21-t+5=7

We move all terms to the left:

21-t+5-(7)=0

We add all the numbers together, and all the variables

-1t+19=0

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

-t=-19

t=-19/-1

t=+19

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