21-7x=18-6x

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Solution for 21-7x=18-6x equation: 



21-7x=18-6x

We move all terms to the left:

21-7x-(18-6x)=0

We add all the numbers together, and all the variables

-7x-(-6x+18)+21=0

We get rid of parentheses

-7x+6x-18+21=0

We add all the numbers together, and all the variables

-1x+3=0

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

-x=-3

x=-3/-1

x=+3

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