[" 12.Two years ago,Salim was thrice as old as ins that "n" she lNCERT EXEMPLARI "],[" years older than twice her age.How old are they now? After 20years,his "],[" 13.The age of the father is twice the sum of the ages of his two children.After 20years,his "],[" 13.The age of the father is twice the sum of the ages of his two chis two child the age of the father."],[" age will be equal to the sum of the ages of his children.Find the age of the father."]