Respuesta :

the first step is to isolate A which gets 39.59a+45=44.99

now get A and only A

39.59a=-.1

now divide both sides by 39.59 getting A= -0.00252589

[tex]39.99a+45=44.99+.40a[/tex]

[tex]39.99a*100+45*100=44.99*100+0.4a*100[/tex]

[tex]3999a+4500=4499+40a[/tex]

[tex]3999a+4500-4500=4499+40a-4500[/tex]

[tex]3999a=40a-1[/tex]

[tex]3999a-40a=40a-1-40a[/tex]

[tex]3959a=-1[/tex]

[tex]\frac{3959a}{3959}=\frac{-1}{3959}[/tex]

[tex]a=\frac{-1}{3959}[/tex]

"a=1/3959 is correct answer".

Hope this helps!

-Thanks!

Charlie

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