x-7+4x=3x+9x-28

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Solution for x-7+4x=3x+9x-28 equation: 



x-7+4x=3x+9x-28

We move all terms to the left:

x-7+4x-(3x+9x-28)=0

We add all the numbers together, and all the variables

x+4x-(12x-28)-7=0

We add all the numbers together, and all the variables

5x-(12x-28)-7=0

We get rid of parentheses

5x-12x+28-7=0

We add all the numbers together, and all the variables

-7x+21=0

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

-7x=-21

x=-21/-7

x=+3

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