Question

39.99a+45=44.99+.40a

Answer 1

$39.99a+45=44.99+.40a$

$39.99a*100+45*100=44.99*100+0.4a*100$

$3999a+4500=4499+40a$

$3999a+4500-4500=4499+40a-4500$

$3999a=40a-1$

$3999a-40a=40a-1-40a$

$3959a=-1$

$\frac{3959a}{3959}=\frac{-1}{3959}$

$a=\frac{-1}{3959}$

"a=1/3959 is correct answer".

Hope this helps!

-Thanks!

Charlie

Answer 2

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