4/5[5/4(x-4)+5x-10]+(0.1x-0.2)/0.1=x-20.1x/0.03-(0.9-0.2x)/0.7=1_数学解答

4/5[5/4(x-4)+5x-10]+(0.1x-0.2)/0.1=x-2
0.1x/0.03-(0.9-0.2x)/0.7=1

人气：311 ℃　时间：2020-02-27 15:07:48

解答

4/5[5/4(x-4)+5x-10]+(0.1x-0.2)/0.1=x-2
(x-4)+4x-8+ (x-2)=x-25x=12x=12/50.1x/0.03-(0.9-0.2x)/0.7=110x/3-(9-2x)/7=1
70x-3*(9-2x)=21
70x-27+6x=21
76x=48
x=12/19