20%x-5/1=5/4 3/1x+4/3x=5/26

问题描述:

20%x-5/1=5/4 3/1x+4/3x=5/26

20%x-5/1=5/4
0.2X-5/1=5/4两边乘5
0.2X*5-1=4
X=4+1=5
3/1x+4/3x=5/26两边乘60
20X+45X=312
65X=312
X=4.8