x+-4x+7=5x+-1x+-21

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Solution for x+-4x+7=5x+-1x+-21 equation: 



x+-4x+7=5x+-1x+-21

We move all terms to the left:

x+-4x+7-(5x+-1x+-21)=0

We add all the numbers together, and all the variables

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

We add all the numbers together, and all the variables

-3x-(+4x)=0

We get rid of parentheses

-3x-4x=0

We add all the numbers together, and all the variables

-7x=0

x=0/-7

x=0

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