X+2/3x+2/5x=28
问题描述:
X+2/3x+2/5x=28
答
(x+2/3x+2/5x)*15=28*15
15x+10x+6x=420
31x=420
x=420/31
答
x=420/31
答
=1+2/3+2/5=(15+10+6)/15=31/15
x=28/15*31=868/15
答
X^2+2/3+2/5=28
X=正负根号下的(404/15)