Question

4. There were 123 adults and twice as many children at a funfair. Halfway, an equal

Answer 1

Answer:

Explanation:

at the beginning

number of adults   x

number of children y

we have z nb of children and parents leaving

so we can write

y - z = 4 ( x - z)

and y = 2x

so 2x - z = 4x - 4z

3z = 2x

so z = 2x/3 = 2 x 123 /3 = 82

so at the end we have

123 -82 = 41 number of adults

246 -82 = 164 number of children