Answer:
The number of adults attended was 600
Step-by-step explanation:
Let
x ----> the number of children attended
y ----> the number of adults attended
we know that
[tex]x+y=800[/tex] -----> equation A
[tex]5x+10y=7,000[/tex] ----> equation B
Solve the system by graphing
The solution of the system of equations is the intersection point both graphs
using a graphing tool
The solution is the point (200,600)
see the attached figure
therefore
The number of children attended was 200 and the number of adults attended was 600
