-5a+4(2a+21)=-1

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Solution for -5a+4(2a+21)=-1 equation: 



-5a+4(2a+21)=-1

We move all terms to the left:

-5a+4(2a+21)-(-1)=0

We add all the numbers together, and all the variables

-5a+4(2a+21)+1=0

We multiply parentheses

-5a+8a+84+1=0

We add all the numbers together, and all the variables

3a+85=0

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

3a=-85

a=-85/3

a=-28+1/3

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