Respuesta :
2a + 3c = 28
a = 2c
2(2c) + 3c = 28
4c + 3c = 28
7c = 28
c = 28/7
c = 4 <== childs ticket
a = 2c
a = 2(4)
a = 8 <== adults ticket
a = 2c
2(2c) + 3c = 28
4c + 3c = 28
7c = 28
c = 28/7
c = 4 <== childs ticket
a = 2c
a = 2(4)
a = 8 <== adults ticket