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解方程. (1)x÷ 6 25 = ...

(1)x÷ 6 25 = 5 12 , x÷ 6 25 * 6 25 = 5 12 * 6 25 , x= 1 10 ;(2) 7 18 ÷x= 14 27 , 7 18 ÷x*x= 14 27 *x, 14 27 *x= 7 18 , 14 27 *x* 27 14 = 7 18 * 27 14 , x= 3 4 ;(3) 1 4 x+ 3 4 = 5 6 , 1 4 x+ 3 4 - 3 4 = 5 6 - 3 4 , 1 4

(1)60%x÷ 6 25 = 5 4 , 60%x÷ 6 25 * 6 25 = 5 4 * 6 25 , 60%x= 3 10 , 60%x÷60%= 3 10 ÷60%, x= 1 2 ;(2) 1 8 *(x+ 1 2 )= 3 4 , 1 8 *(x+ 1 2 ) ÷ 1 8 = 3 4 ÷ 1 8 , x+ 1 2 =6, x+ 1 2 - 1 2 =6- 1 2 , x=5.5.

(1)x:6=25, 5x=6*2, 5x÷5=12÷5,

1÷25%X=6解:原式变为1*100/25X=64X=6X=6/4X=1.5

x÷(5/6)=30'x=30*(5/6)x=5*5x=25;如果本题有什么不明白可以追问,

x÷6/25=5/12x=5/12*6/25x=1/10

1/5*8÷x=6/25x=8/5÷6/25x=20/3

X/(6/35)=(26/45)/(13/25)X=(26/45)/(13/25)*(6/35)=(26/45)*(25/13)*(6/35)=52/273[二百七十三分五十二]

8/5=6/25x,然后用8/5除以6/25等于20/3

1/(1/x(1+25%))=x(1+25%)则方程化为x(1+25%)=x-6,即1.25x=x-6,0.25x=-6,解得x=-24

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