The age o the father is twice the sum of the ages of his two children . after 20 years , his age will be equal to the sum of the ages of his cildren . find the age of the father
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Let f be age of father, s be the sum of ages of children
f = 2s -----eqn i
f + 20 = s+20+20
f + 20 = s + 40
f = s + 20. -----eqn ii
Equating:
2s = s + 20
2s - s = 20
s = 20
Substituting in eqn i:
f = 2*20
f = 40
Father is 40 years old
f = 2s -----eqn i
f + 20 = s+20+20
f + 20 = s + 40
f = s + 20. -----eqn ii
Equating:
2s = s + 20
2s - s = 20
s = 20
Substituting in eqn i:
f = 2*20
f = 40
Father is 40 years old
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