5x—4.9x=0.31 3.4÷x=4.8÷24 8—3(x+0.2)=0.8
问题描述:
5x—4.9x=0.31 3.4÷x=4.8÷24 8—3(x+0.2)=0.8
答
5x-4.9x=0.31
0.1x=0.31
x=0.31÷0.1
x=31
3.4÷x=4.8÷24
3.4=0.2x
x=3.4÷0.2
x=17
8-3(x+0.2)=0.8
8-3x-0.6=0.8
-3x=-6.6
x=-6.6÷(-3)
x=2.2
不懂可追问!