12x-21=2(5x-9)+2x-3

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Solution for 12x-21=2(5x-9)+2x-3 equation: 



12x-21=2(5x-9)+2x-3

We move all terms to the left:

12x-21-(2(5x-9)+2x-3)=0



We calculate terms in parentheses: -(2(5x-9)+2x-3), so:

2(5x-9)+2x-3

We add all the numbers together, and all the variables

2x+2(5x-9)-3

We multiply parentheses

2x+10x-18-3

We add all the numbers together, and all the variables

12x-21

Back to the equation:

-(12x-21)



We get rid of parentheses

12x-12x+21-21=0

We add all the numbers together, and all the variables

=0

x=0/1

x=0

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