The age of father is equal to a sum of the ages of his 5 children . After 15 years sum of ages of the children will be twice the age of the father.find the age of father.
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Let f be the age of father and s be sum of ages of children
s = f -----eqn i
s + (15*5) = 2 (f + 15)
s + 75 = 2f + 30
s = 2f + 30 - 75
s = 2f - 45 -----eqn ii
Equating the RHS of both equations:
f = 2f - 45
2f - f = 45
f = 45
Father is 45 years old
s = f -----eqn i
s + (15*5) = 2 (f + 15)
s + 75 = 2f + 30
s = 2f + 30 - 75
s = 2f - 45 -----eqn ii
Equating the RHS of both equations:
f = 2f - 45
2f - f = 45
f = 45
Father is 45 years old
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