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10) → Michael paid $8.40 for a DVD after having been given a 30% discount.
What was the presale price of the DVD?
On my elementary math class on college I Don’t know where to start this needs to be shown full work

10 Michael paid 840 for a DVD after having been given a 30 discount What was the presale price of the DVD On my elementary math class on college I Dont know whe class=

Respuesta :

Answer:

Step-by-step explanation:

If the presale price is [tex]x[/tex],

then [tex]x*(1-0.30)=8.40\\0.70x=8.40\\x=8.40/0.70=12.0\\[/tex]

Thus the presale price is $12.0