Question

A and B are together 90 years old 5 years ago A was thrice an old B was find A and B

Answer 1

hi

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A and B are together 90 years old 5 years ago A was thrice an old B was find A and B

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acq,

a +b = 90

a = 90 -b.....................[1]

and

(a -5) = 3(b-5)

a- 5 = 3b - 15

since a = 90 -b

90 -b-5 = 3b-15

85-b = 3b-15

85+15=3b+b

4b=100

b = 25 years

a = 90 -b

      = 90 -25

       = 65 years

:)