-40a-33(27-6a)=38(a+15)-21

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Solution for -40a-33(27-6a)=38(a+15)-21 equation: 



-40a-33(27-6a)=38(a+15)-21

We move all terms to the left:

-40a-33(27-6a)-(38(a+15)-21)=0

We add all the numbers together, and all the variables

-40a-33(-6a+27)-(38(a+15)-21)=0

We multiply parentheses

-40a+198a-(38(a+15)-21)-891=0



We calculate terms in parentheses: -(38(a+15)-21), so:

38(a+15)-21

We multiply parentheses

38a+570-21

We add all the numbers together, and all the variables

38a+549

Back to the equation:

-(38a+549)



We add all the numbers together, and all the variables

158a-(38a+549)-891=0

We get rid of parentheses

158a-38a-549-891=0

We add all the numbers together, and all the variables

120a-1440=0

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

120a=1440

a=1440/120

a=12

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