First you want to divide $90 by four. You want to take the answer and divide it by 2.
$90 / 4 = $22.5
22.5 / 2 = Mrs. Jackson saved $11.25.
4 infants
Altogether children (4+11) =15
Infants is 4/15 of the children .
Addition and multiplication are commutative property so that mean no.
In this case, you have to do division.
Your answer is 6x = 72
x = 12
Hope this helps :)
X is equal to about 3.218876