x乘以《1-37.7%》= 8分之5
问题描述:
x乘以《1-37.7%》= 8分之5
答
(1-37.7%)x = 5/8
两边同乘以 1000 得
(1000 - 377)x = 625
623x = 625
x = 625 / 623