Subtract z from the right side so that it becomes... u - z = vw
Then all you do is divide the right side of the equation(or equals sign) by w because your goal is to get whatever you're solving for by itself.
Your answer, then, is... u-z/w = v
No you want get the shoes because 20% of will get you to 237 dollars to pay and thats not under 200 dollars
D = adult
c = child
t = total admission cost
t = 8d + 5c
t = 8(2) + 5(3) = $31