Answer:
cost of 1 adult = 8
Explanation:
two adults and one child == 20
one adult and two children == 16
what is the cost for one adult?
2 adults + 1 child == 20
1 adult and 2 children == 16
if 1 adult price is x and let 1 children be y
2x + y = 20 ........(1)
x + 2y =16 .........(2)
using simultaneous equation of substitution method
eqn (1) becomes y = 20- 2x ........(3)
input eqn (3) in (2)
x + 2(20- 2x) =16 .........(4)
x + 40 - 4x = 16
40 -3x =16
-3x = 16 - 40 = -24
x == 8
since x equal 8
therefore, cost of 1 adult = 8
