7x+63=4x+21

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Solution for 7x+63=4x+21 equation: 



7x+63=4x+21

We move all terms to the left:

7x+63-(4x+21)=0

We get rid of parentheses

7x-4x-21+63=0

We add all the numbers together, and all the variables

3x+42=0

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

3x=-42

x=-42/3

x=-14

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