7x-3=10x-21

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Solution for 7x-3=10x-21 equation: 



7x-3=10x-21

We move all terms to the left:

7x-3-(10x-21)=0

We get rid of parentheses

7x-10x+21-3=0

We add all the numbers together, and all the variables

-3x+18=0

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

-3x=-18

x=-18/-3

x=+6

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