7x-(2x+5x)=18

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Solution for 7x-(2x+5x)=18 equation: 



7x-(2x+5x)=18

We move all terms to the left:

7x-(2x+5x)-(18)=0

We add all the numbers together, and all the variables

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

We get rid of parentheses

7x-7x-18=0

We add all the numbers together, and all the variables

-18!=0

There is no solution for this equation

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