急~~帮忙,英文数学题!
An item marked at $M is sold at a discount of 2%. If the selling price of the item is $(M-0.12),find the value of M.
人气：106 ℃ 时间：2020-02-05 13:40:30
解答
m*(1-2%)=m-0.12
0.98m=m-0.12
m=6
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