4*(7.8-x)=16方程怎么解

问题描述:

4*(7.8-x)=16方程怎么解

4*(7.8-x)=16
7.8-x=4
x=7.8-4
x=3.8

x-7.8+2.6=5.4解方程 X=5.4+7.8-2.6 =10.6 10.6 x-7.8+2。6=5。4 x-7.8+2.6-2.6=5.4-2.6 x-7.8=2.6

4*7.8-4x=16
31.2-4x=16
4x=31.2-16
4x=15.2
x=3.8

7.8-x=16/4
x=7.8-16/4
x=3.8

4*(7.8-x)=16
7.8-x=4
x=3.8

4*7.8-4x=16
4x=4*7.8-16
x=7.8-4
x=3.8

等式两边先除以4,7.8-x=4,在移项;x=7.8-4=3.8