So for this our goal is to isolate t since its the total price. All you have to do is add yz on both sides of the equation, and your answer should be 
A = 3x
b = 2x+25
180 = a + b
180 = 3x + 2x + 25
180 = 5x + 25
155 = 5x
x = 31
a = 3*31 = 93
b = 2*31 + 25 = 87
Answer:
b then a
Step-by-step explanation: