7x-4x+21=15x

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Solution for 7x-4x+21=15x equation: 



7x-4x+21=15x

We move all terms to the left:

7x-4x+21-(15x)=0

We add all the numbers together, and all the variables

-12x+21=0

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

-12x=-21

x=-21/-12

x=1+3/4

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