2)Eric has a piece of string 80 cm long.He cuts the string into 3 parts of different
lengths.The length of the longest part is 3 times that of the shortest part,and the middle-sized part is 5 cm longer than the shortest part. How long is each part?
3)Simom has some$2 and $5 coins.The number of $2 coins is 5 more than the number of $5 coins.If the total value of the coins is $94,find the number of $5 coins.
4)Grandmother is 48 years older than Bobby.Her age will be 5 times Bobby's age 2 years later.How old is Bobby now?
5)Mr.Wong had 25 $20 notes and some $50 and$100 notes .The number of $50 notes was twice the number of $100 notes.
(a)Write down an algebraic expresson to show the total value of the notes in terms of x.
(b)After buying a camera for$1500,Mr.Wong still had $800.Find the value of x.
6)Fanny made a profit of $1020 on selling sports shoes and slippers.The profits from selling a pair of sports shoes and slippers are $40 and$25 respectively.
Suppose that 30 pairs of shoes are sold of which x pairs are sports shoes.
a)Express the total profit from selling the slippers.
b)Find the value of x.
7)Mrs.Mok bought 8 mangoes and 10 pears in a supermaket. The cost of a mango was $2 more than a pear.Mrs.Mok paid $100 for the fruit and the change was$12.
a)How much was a pear?
b)If an orange is $1 cheaper than a pear,how many oranges can be bought with $100 at most?
兩日時間，越快越好，最快的是最佳解答！(要準確，錯一兩條沒所謂....）
更新1:
漏左一題= = The length of a retangle is 3 cm more than twice its width.If the perimeter of the rectangle is 42 cm,find the width of the rectangle.
