100=60+4[(x-5)/(30-5)]*6% 高手来帮我下,X是多少,100=60+40[(x-5)/(30-5)]*6%_其他解答

100=60+4[(x-5)/(30-5)]*6% 高手来帮我下,X是多少,
100=60+40[(x-5)/(30-5)]*6%

人气：246 ℃　时间：2020-09-12 19:44:04

解答

100=60+40[(x-5)/(30-5)]*6%
40=40[(x-5)/(30-5)]*6%
[(x-5)/(30-5)]*6%=1
[(x-5)/25]=1/6%
[(x-5)/25]=100/6=50/3
x-5=1250/3
所以,x=5+1250/3=1265/3