-7(-7a-3)=-8(3-5a)

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Solution for -7(-7a-3)=-8(3-5a) equation: 



-7(-7a-3)=-8(3-5a)

We move all terms to the left:

-7(-7a-3)-(-8(3-5a))=0

We add all the numbers together, and all the variables

-7(-7a-3)-(-8(-5a+3))=0

We multiply parentheses

49a-(-8(-5a+3))+21=0



We calculate terms in parentheses: -(-8(-5a+3)), so:

-8(-5a+3)

We multiply parentheses

40a-24

Back to the equation:

-(40a-24)



We get rid of parentheses

49a-40a+24+21=0

We add all the numbers together, and all the variables

9a+45=0

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

9a=-45

a=-45/9

a=-5

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