the sum of age of a man and his son Is 45 year. five year ago the product of their ages was four time the man age at the time. find their present age
Answers
Answer:
Step-by-step explanation: let the father age be x and son age be y
x+y=45
five years ago their ages be,
father age= x-5
son age = y=45-5-x
y=40-x
(x-5)(40-x)=4(x-5)
x sq - 49x + 180 =0
finding roots of eq
xsq - 45x - 4x + 180 = 0
x(x-45)-4(x-45)=0
(x-45)(x-4)=0
X=45
present father age =45-5=40 years
present son age = 40+Y=45
y=5 years