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Workbook

b) Together, three men paint a wall in 6 hours. Alone the first man takes twice as long as the second,
and the second takes 6 hours longer than the third. In how many hours can slowest man paint the
wall?

3x 4y 6z
7.   and x y z 28   are given. Find x, y, z.
2 3 5

x y
8. If x  2 3xy  0 then find x   0
x y

2
9. Write a problem by using the proportion  7 .
6 x

81 091math-wb-w6-(equations&inequalities-1)