Question 1154012
Hi,
Make adult = x
Make child = y
x + y = 450......Equation (1)
1.5x + y = 562.50....Equation (2)
Take Eq(1) from Eq(2)
0.5x     = 112.50
x        = 225
substitute x = 225 into Eq(1)
x + y = 450
225 + y = 450
y     = 225
225 Adult's tickets were sold
225 children's tickets were sold
Hope this helps :-)