Answer: x + y = 1000
Explanation:
From the. Table provided :
500 500
450 550
400 600
350 650
X = number of children
Y = Number of Adult
The sum of both x and y gives 1000 in all 4 scenarios :.
500 + 500 = 1000
450 + 550 = 1000
400 + 600 = 1000
350 + 650 = 1000
Hence, equation ;
x + y = 1000