21+21x-9=18x-(12-3x)

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Solution for 21+21x-9=18x-(12-3x) equation: 



21+21x-9=18x-(12-3x)

We move all terms to the left:

21+21x-9-(18x-(12-3x))=0

We add all the numbers together, and all the variables

21x-(18x-(-3x+12))+21-9=0

We add all the numbers together, and all the variables

21x-(18x-(-3x+12))+12=0



We calculate terms in parentheses: -(18x-(-3x+12)), so:

18x-(-3x+12)

We get rid of parentheses

18x+3x-12

We add all the numbers together, and all the variables

21x-12

Back to the equation:

-(21x-12)



We get rid of parentheses

21x-21x+12+12=0

We add all the numbers together, and all the variables

24!=0

There is no solution for this equation

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