2. If a number is dicided by 4 and 4 is added to the quotient , the result is 17 . What is the number ?
3. Twice the sum of 2 and a number is equal to 12 . What is the number ?
4. A stone and 3 one-gram weights balance with 1 fifty-gram weights and 4 one-gram weights . What is the weight of the stone ?
5. A man is 3 times as old as his daughter . Five years ago , the man was 31 years old . What is the age of his daughter now ?
6. A woman is twice as old as her son . Four years ago , her son was 17 years old . What is the age of his mother now ?
7. The length of a rectangle is (2x+5) cm and the breadth is 6 cm . Given that the area is 66 cm2 , find x .
8. A plant grows 3.5 cm pre week . It is now 10 cm tall . How many weeks from now will the plant grow to height of 27.5 cm ?
9. Peter has y more marbles than John . John has 8 marbles and together they have 25 marbles . Find y .
更新1:
咩叫 y*2 ??