Question

There are 40 people at a picnic, there are 4 more children than adults. How many of each are there? adults? children?

Answer 1

40/2 = 20

How about 18 and 22?

Answer 2

x = no. of adults
x + 4 = no. of children
x + x+4 = 40
2x + 4 = 40
2x = 36
x = 18