(1800 divided by 3/5) times (5/ 12)= 1250.
3. 100 divided by (1-4/5)=500.
4. Let Party A and Party B bring X and Y yuan respectively, and there will be equations.
{x+y= 108.................①
( 1-2/4)x=( 1-80%)y..②
② The simplified formula is:1/2x-1/5y = 0 → 5x-2y = 0.
Substitute ①: y= 108-x into ②: 5x-2( 108-x)=0.
5x-2 16+2x=0
7x=2 16
x=2 16/7
Then: y =108-216/7 = 540/7.
5.( 10/2) *3. 14 squared times (9.2-8)=94.2.
6. Suppose a * * * has X books, then:
(x-0.25 x- 140):(0.25 x+ 140)= 1:5
5(x-0.25 x- 140)= 0.25 x+ 140
5x- 1.5x= 140+700
x=240
7. If the set price is X and the original price is x-50, then:
[0.75 x-(x-50)]* 10 =[x-30-(x-50)]* 12
x= 104
Hanma Chen Jue An Waizhen won the bid for Qingshi yangjin Kaitai Fu Min Zhengqing Exhibition.