7-3x-4=3x-21

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Solution for 7-3x-4=3x-21 equation: 



7-3x-4=3x-21

We move all terms to the left:

7-3x-4-(3x-21)=0

We add all the numbers together, and all the variables

-3x-(3x-21)+3=0

We get rid of parentheses

-3x-3x+21+3=0

We add all the numbers together, and all the variables

-6x+24=0

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

-6x=-24

x=-24/-6

x=+4

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