-1/4(72-28a)=0.8(9a-20)

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Solution for -1/4(72-28a)=0.8(9a-20) equation: 



-1/4(72-28a)=0.8(9a-20)

We move all terms to the left:

-1/4(72-28a)-(0.8(9a-20))=0



Domain of the equation: 4(72-28a)!=0

a∈R



We add all the numbers together, and all the variables

-1/4(-28a+72)-(0.8(9a-20))=0

We multiply all the terms by the denominator


-((0.8(9a-20)))*4(-28a+72)-1=0



We calculate terms in parentheses: -((0.8(9a-20)))*4(-28a+72), so:

(0.8(9a-20)))*4(-28a+72

We add all the numbers together, and all the variables

-28a+(0.8(9a-20)))*4(+72

Back to the equation:

-(-28a+(0.8(9a-20)))*4(+72)



We add all the numbers together, and all the variables

-(-28a+(0.8(9a-20)))*472-1=0

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

-(-28a+(0.8(9a-20)))*472=1

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