21x-9=5(4x+3)-6

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Solution for 21x-9=5(4x+3)-6 equation: 



21x-9=5(4x+3)-6

We move all terms to the left:

21x-9-(5(4x+3)-6)=0



We calculate terms in parentheses: -(5(4x+3)-6), so:

5(4x+3)-6

We multiply parentheses

20x+15-6

We add all the numbers together, and all the variables

20x+9

Back to the equation:

-(20x+9)



We get rid of parentheses

21x-20x-9-9=0

We add all the numbers together, and all the variables

x-18=0

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

x=18

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