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x%1.5x=1.9解方程

X(1-1.5)=1.9 X(-0.5)=1.9 x=-1.9/0.5 x=-3.8

0.75+x/9=1.5 x/9=0.75 x=6.75 所以原方程的解为x=6.75

x=1/9+5/6 =2/18+15/18 =17/18

X=4╱3 X=3.8 X=100╱3 X=0.1 X=5 X=4

12分之1x+9分之1*(10-x)=1 解:1/12x+10/9-1/9x=1 1/9x-1/12x=10/9-1 1/36x=1/9 x=4

(1)9:5=4.5:x,9x=4.5×5,9x÷9=22.5÷9,x=2.5;(2) x- 4 9 x= 10 21 , 5 9 x= 10 21 , 5 9 x÷ 5 9 = 10 21 ÷ 5 9 , x= 6 7 ;(3)50%x-30=52, 50%x-30+30=52+30, 50%x=82, 50%x÷50%=82÷50%, x=164.

1.77-0.06=1.9x 1.9x=1.71 x=0.9

3x-9=x+1 3x-x=1+9 2x=10 x=5

x+2/9=5/6 x=5/6-2/9 =15/18-4/18 =11/18 2.5X+1=6.5 2.5x=6.5-1=5.5 x=5.5/2.5 =2.2

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