Respuesta :
c = children, a = adults
c + a = 700...c = 700 - a
7c + 10a = 6400
7(700 - a) + 10a = 6400
4900 - 7a + 10a = 6400
3a = 6400 - 4900
3a = 1500
a = 1500/3
a = 500
a + c = 700
500 + c = 700
c = 700 - 500
c = 200
there were 200 children and 500 adults
c + a = 700...c = 700 - a
7c + 10a = 6400
7(700 - a) + 10a = 6400
4900 - 7a + 10a = 6400
3a = 6400 - 4900
3a = 1500
a = 1500/3
a = 500
a + c = 700
500 + c = 700
c = 700 - 500
c = 200
there were 200 children and 500 adults
Answer:
there were 200 children and 500 adults
Step-by-step explanation: