4x-21=7x+24

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Solution for 4x-21=7x+24 equation: 



4x-21=7x+24

We move all terms to the left:

4x-21-(7x+24)=0

We get rid of parentheses

4x-7x-24-21=0

We add all the numbers together, and all the variables

-3x-45=0

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

-3x=45

x=45/-3

x=-15

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