7t-5=8t-21=4t-5

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Solution for 7t-5=8t-21=4t-5 equation: 



7t-5=8t-21=4t-5

We move all terms to the left:

7t-5-(8t-21)=0

We get rid of parentheses

7t-8t+21-5=0

We add all the numbers together, and all the variables

-1t+16=0

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

-t=-16

t=-16/-1

t=+16

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