7x-4=12x+3x

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Solution for 7x-4=12x+3x equation: 



7x-4=12x+3x

We move all terms to the left:

7x-4-(12x+3x)=0

We add all the numbers together, and all the variables

7x-(+15x)-4=0

We get rid of parentheses

7x-15x-4=0

We add all the numbers together, and all the variables

-8x-4=0

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

-8x=4

x=4/-8

x=-1/2

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