SOLUTION: a group of 80 people attend a ball game. there were four times as many children as adults in the group. write a system of equations that you could use to set up this problem, wher

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: a group of 80 people attend a ball game. there were four times as many children as adults in the group. write a system of equations that you could use to set up this problem, wher      Log On


   

Question 144849: a group of 80 people attend a ball game. there were four times as many children as adults in the group. write a system of equations that you could use to set up this problem, where a is the number of adults and c is the number of children in the group. solve the system of equations for c, the number of childern in the group
Answer by shahid(44) About Me  (Show Source):
You can put this solution on YOUR website!
80 people are there so first equation is
a+c=80....(1)
second equ formed by condition is
c=4a ....(2) subtacting both equations
a=80-4a
a+4a=80
5a=80
a=80/5
a=16 so c=4(16)=64 there were 64 children in the group