45 children attend preschool the number of two-year-olds is 1/2 the number of three-year-olds the number for your old is the sam
e as the number of three-year-olds
1 answer:
There are 9 two-year-olds and 18 each of 3 and 4 year olds.
To solve this we could write and solve the equation below, letting x be the number of 3 and 4 year olds.
x/2 + x + x = 45
x + 2x + 2x = 90
5x = 90
x = 18
From here, we just divide 18 by 2 to get the number of 2 year olds.
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