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does that help?

thanks i understand a

but for b dont i have to find out exactly how many sales that were made

that is why you are solving for x

you go 720=500+.04x

oh ok and u isolate x right

then 220=.04x

then divide 220 by .04

yep

220/.04=5550

so she would have to sell 5550 items to make 720 dollars right

yep

yayy!! thank you :)