Question 996496
Let x be the number of children's tickets and y will be adult tickets.
We know the number equation to be
x + y = 224
The value equation is
7x + 10y = 2000
If we multiply the top equation by ten, we get
10x + 10y = 2240  and copy the second one and subtract them, we get
-(7x + 10y = 2000)
and
3x = 240
x = 80
Then
y = 224 - 80 
y = 144