21+4t-t=40

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Solution for 21+4t-t=40 equation: 



21+4t-t=40

We move all terms to the left:

21+4t-t-(40)=0

We add all the numbers together, and all the variables

3t-19=0

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

3t=19

t=19/3

t=6+1/3

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