来自孙海蓉的问题
0.3(8.6-x)=1.5(x-5+11)/3=7.2
0.3(8.6-x)=1.5
(x-5+11)/3=7.2
1回答
2020-03-14 02:10
0.3(8.6-x)=1.5(x-5+11)/3=7.2
0.3(8.6-x)=1.5
(x-5+11)/3=7.2
0.3(8.6-x)=1.5两边除0.3
8.6-x=5两边乘-1
x-8.6=-5
x=8.6-5=3.5
(x-5+11)/3=7.2
(x+6)/3=7.2两边乘3
x+6=21.6
x=15.6