4t+21=7t-3

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Solution for 4t+21=7t-3 equation: 



4t+21=7t-3

We move all terms to the left:

4t+21-(7t-3)=0

We get rid of parentheses

4t-7t+3+21=0

We add all the numbers together, and all the variables

-3t+24=0

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

-3t=-24

t=-24/-3

t=+8

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