-4=-4/5*a

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Solution for -4=-4/5*a equation: 



-4=-4/5a

We move all terms to the left:

-4-(-4/5a)=0



Domain of the equation: 5a)!=0

a!=0/1

a!=0

a∈R



We get rid of parentheses

4/5a-4=0

We multiply all the terms by the denominator


-4*5a+4=0

Wy multiply elements

-20a+4=0

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

-20a=-4

a=-4/-20

a=1/5

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