GMAT数学题求解~~A store currently charges the same price for eachtowel that it sells. Ifthe current price of each towelwere to be increased by $1, 10 fewer of the towelscould be bought for $120, excluding sales tax. Whatis the current price of e

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GMAT数学题求解~~A store currently charges the same price for eachtowel that it sells. Ifthe current price of each towelwere to be increased by $1, 10 fewer of the towelscould be bought for $120, excluding sales tax. Whatis the current price of e
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GMAT数学题求解~~A store currently charges the same price for eachtowel that it sells. Ifthe current price of each towelwere to be increased by $1, 10 fewer of the towelscould be bought for $120, excluding sales tax. Whatis the current price of e
GMAT数学题求解~~
A store currently charges the same price for each
towel that it sells. Ifthe current price of each towel
were to be increased by $1, 10 fewer of the towels
could be bought for $120, excluding sales tax. What
is the current price of each towel?
(A) $1
(B) $2
(0 $3
(D) $4
(E) $12
有些看不懂 求各位大神帮帮忙~~

GMAT数学题求解~~A store currently charges the same price for eachtowel that it sells. Ifthe current price of each towelwere to be increased by $1, 10 fewer of the towelscould be bought for $120, excluding sales tax. Whatis the current price of e
用120块钱去买东西,单价加1块钱后就少买10个
设当前价格为p,根据题目可以列出方程:

120 / ( x + 1 ) = 120 / x - 10

求解方程,得到 x = 3

previous price=x
current price = x+1
$120/(x+1) - $120/x = -10
x=3 or x=-4
current price = x+1 = $4

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