X除以(X+4.5)=0.7 求X

问题描述:

X除以(X+4.5)=0.7 求X

X/(x十4.5)=0.7
x= 0.7(x十4.5)
x=0.7x十3.15
x-0.7x=3.15
0.3x=3.15
x=3.15/0.3
x=10.5