2x+7-5x=4x-21

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Solution for 2x+7-5x=4x-21 equation: 



2x+7-5x=4x-21

We move all terms to the left:

2x+7-5x-(4x-21)=0

We add all the numbers together, and all the variables

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

We get rid of parentheses

-3x-4x+21+7=0

We add all the numbers together, and all the variables

-7x+28=0

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

-7x=-28

x=-28/-7

x=+4

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