解方程 9(x-5)=40.5 3.2(x-8)=16

问题描述:

解方程 9(x-5)=40.5 3.2(x-8)=16

9(x-5)=40.5
x-5=4.5
x=9.5
3.2(x-8)=16
x-8=5
x=13

9(x-5)=40.5 ,
x-5=4.5,
x=9.5.
3.2(x-8)=16
x-8=5,
x=13.

第一个x=9.5 第二个x=13

9(x-5)=40.5
x-5=4.5
x=9.5
3.2(x-8)=16
x-8=5
x=13

9(x-5)=40.5
x-5=40.5÷9
x-5=4.5
x=5+4.5
x=9.5
3.2(x-8)=16
x-8=16÷3.2
x-8=5
x=8+5
x=13

9(x-5)=40.5
x-5=40.5/9
x-5=4.5
x=4.5+5
x=9.5
3.2(x-8)=16
x-8=16/3.2
x-8=5
x=5+8
x=13