SOLUTION: The 6th graders from an elementary school are going to celebrate the end of the year by going to the local pizza parlor. There are 120 in the whole group and there are 2 times as m

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Question 145291: The 6th graders from an elementary school are going to celebrate the end of the year by going to the local pizza parlor. There are 120 in the whole group and there are 2 times as many children as adults in the group. How many children are there?
Answer by nerdybill(5412) About Me  (Show Source):
You can put this solution on YOUR website!
Let x = number of adults in group
then from "there are 2 times as many children as adults in the group." we get:
2x = number of children in the group
.
x + 2x = 120
3x = 120
x = 40 <<--adults
2x = 80 <<--children