0.6X=0.4x(X+1)
0.6X=0.4X+0.4
0.6X-0.4X=0.4
0.2X=0.4
X=2
X+5=0.5X+7
X-0.5X=7-5
0.5X=2
X=4
6X+0.5-7=8
0.6X=8+7-0.5
0.6X=14.5
X=24又6分之1
(7+3.2)*X=0.4
10.2=0.4X
X=25.5
8X-8x3=3X
8X-24=3X
8X=3X+24
8X-3X=24
5X=24
X=4.8
(X-5)*3=(X+8)*5
(可当成比例解)
5x(X-5)=(X+8)x3
5x-25=3x+24
5x-3x=24+25
2x=49
x=24.5