解方程:题1:0.2(3-x)=0.4(6-x) 题2:9.6-4x=25.6-9解方程:题1:0.2(3-x)=0.4(6-x)题2:9.6-4x=25.6-9x
问题描述:
解方程:题1:0.2(3-x)=0.4(6-x) 题2:9.6-4x=25.6-9
解方程:
题1:0.2(3-x)=0.4(6-x)
题2:9.6-4x=25.6-9x
答
题1:0.2(3-x)=0.4(6-x)
0.6-0.2x=0.24-0.4x
-0.2x+0.4x=0.24-0.6
0.2x=-0.36
x=-1.8
题2: 9.6-4x=25.6-9
9.6-4x=16.6
-4x=16.6-9.6
-4x=7
x=-7/4
答
0.6-0.2x=2.4-0.4x
0.4x-0.2x=2.4-0.6
0.2x=1.8
x=9
9x-4x=25.6-9.6
5x=16
x=3.2
答
0.6-0.2X=2.4-0.4X
0.2X=1.8
X=9
9.6-4x=25.6-9x
5X=16
X=3.2