A.3n2-1=8 B.2n=8 C.[(1/2)n]+[(1/2)n]=1 D.2n+2=-3n
2.solve the equation 3x-3=6(7-2x)
3. solve the equation 5(k-1)-3(k+1)=10
4. solve the equation 4m-2=4m-(18-4m)+12
5. solve the equation 3x-14=(2/5)(8x-6)
6.lily had $200.she bought a number of pensk,each of which costed $5.she also bought a number of drawing pens,each of which costed $9.the number of pens was 2 times of that of drawing pens.after paying the bill,Lily still had $105.how many drawing pens did she buy?
7.the perimeter of a rectangle is 26cm.if the length of this rectangle is reduced by 1cm and its width is increased by 2cm,it will become a square.what is the original length of this rectangle? A.7cm B.8cm C.9cm D.10cm
8.Mrs Cheung bought home a box of apples.if each family member could get 3 apples,3 apples would be left.if each family member got 4 apples,2 more would be required. (a)how many people were there in Mrs.Cheung’s family? (b) how many apples did a box contain?
9.in a toy factory,each worker produce 12 pieces of toys per day on average.in order to reproduce 10500 pieces of toys,the factory assigned a number of workers to complete
the project. In order to boost up the speed of the production,the number of workers was increased by half after 10 days.5 more days later,the project was completed.how many workers worked for the project before the factory assigned more workers?
10.Yvonne bought a sweater,a pair of jeans and a pair of shoes in a department store.she spent $450 in total.if the price of the pair of jeans was 2 times of that of the sweater and the pair of shoes was $45 more expensive than the sweater,find the price of the sweater.
11.the age of Mr.Lau is 2 times of that of his son now.5 years later,the sum of their ages will be 82 years old.find (a)the current age of Mr Lau’s son (b)the current age of Mr Lau
12.the money box of Wendy contained some one-dollar coins,tow-dollar coins,five-dollar coins and ten-dollar coins.the total number of coins was 24.given that there were 9 one-
dollar coins,and the number of two-dollar coins was 1 less that of five dollar coins was 2 more than that of ten-dollar coins,find the number of ten-dollar coins,
13. x+[(3x-1)/2]=2x. find the value of x 14. [(p+1)/2]+[(p-1)/3]=1 find the value of p
15. 3+[(a+3)/(a-1)]+{16/[2(a-1)]}=11-[16/(a-1)] find the value of a 16. solve the equation [(-3x)/0.5]+[(3x+2)/0.05]=31.9
17.A school organized the Casual Wear Day for charity. Wayne donated $60.given that the donation of Wayne was $20 more than 1/3 of that of Yvonne.how much did they donate in total?
18.the number of seats in cinema A was 2/3 of that of cinema B.the two cinemas could accommodate 100 people in total.find: a)the number of seats in cinema A b) the number of seats in cinema B
19.in Mingo’s money box,there were 10 coins in total.these coins include $2,$5 and $10coins.given that the number of $2 coins was 1 more than half of the number of $5 coins ,and the number of $5 coins was 2 less than 2 times of that of $10 coins.let the number of $ 10 coins be $n.
a)set up the equation. A. n+2n+2+1/2(2x-2)+1=10 B. n+(2n-2)+[1/2(2n-2)+1] =10 C. n+2x+[1/2(2n-2)+1]=10 D. n+n-2+[1/2(2n-2)+1]=10
b)find the number of $10 coins.
20.Cindy bought 3 packs of juice and 2 pieces of cakes in a cake shop.she paid $28 in total.if the price of each pack of juice was 1/2 of that of a piecem of cakes.find the price of a piece of cakes
