Question

3. John pays 50 for a postage stamp for his
collection. If its value appreciates by 15% each
year, what will it be worth in 3 years?
1. what is the answer​

Answer 1

Answer:

here is yours answer

Step-by-step explanation:

Add down each column to get the equations

x + y = 50 (equation 1)

15x + 20y = 950 (equation 2)

Use Substitution Method

Isolate variable x in equation 1

x = 50 – y (equation 3)

Substitute equation 3 into equation 2

15(50 – y) + 20y = 950

750 – 15y + 20y = 950

20y – 15y = 950 – 750

5y = 200

y = 40

Substitute y = 40 into equation 1

x + 40 = 50

x = 10

Answer: John has ten 15¢ stamps and forty 20¢ stamps.