急~~帮忙,英文数学题!An item marked at $M is sold at a discount of 2%. If _英语解答

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：311 ℃　时间：2020-02-05 13:40:30

解答

m*(1-2%)=m-0.12
0.98m=m-0.12
m=6