Question

PLZ help! Problem in description...

Answer 1

Building A was built 10 years before building B and 5 years after building C. In 20 years, the combined ages of building A and building C will be 3 times that of building B. What is the present age of each building?

Answer 2

""let A be 'a' years old
B be 'b' yrs old and C be 'c' years old.
a = b+10
c = a + 5
a +20 + c +20 = 3 (b + 20)

a + 20 + a + 5 + 20 = 3 (a -10 + 20)
2a + 45 = 3a + 30

a =15
b = a - 10 = 5
c = a + 5 = 20"" - Yahoo Answers

Answer 3

Thanks so much!