Fill in the blanks.
The number of boys is 9 more than the girls.
The number of adults is seven times the number of children.
Let the number of girls be 1 u.
- Number of boys = 1 u + _____
- Number of children = 2 u + _____
- Number of adults = _____ u + 63
- Number of people = _____ u + 72
(a)
Change X times and more than or less than into units.
The number of boys is 9 more than the girls.
Number of girls = 1 u
Number of boys = 1 u + 9
(b)
Number of children
= 1 u + 1 u + 9
= 2 u + 9
(c)
The number of adults is seven times the number of children.
Number of adults
= 7 x (2 u + 9)
= 14 u + 63
(d)
Total number of people
= (2 u + 9) + (14 u + 63)
= 2 u + 14 u + 9 + 63
= 16 u + 72
Answer(s): (a) 9; (b) 9; (c) 14; (d) 16