Ex(2) Salil's age is 23 years more than half of the Sangram's age. Five years ago, the sum of their ages was 55 years. Find their present ages. Solution: Let Salil's present age be x and Sangram's present age be y. 2 Salil's age is 23 years more than half of the Sangram's age: x-+ Five years ago Salil's age-x-5. Five years ago Sangram's age-y-5 The sum of their ages five years ago = 55 0.0-55 Finding the solution by solving equations 2x-y+46 (x-5)+(y-5)-55 2x-y=46d) ..(II) *+y=65 Adding equation (I) and (II) 2x-y=46 + x+y=65 .. 3x = 111 .. x = 37 Substituting x = 37 in equation (II) xty = 65 7. 37+ y = 65 ; y = 65-37 :, y = 28 Salil's present age is 37 years and Sangram's present age is 28 years. Ex (3) A two digit number is 4 times the sum of its digits. If we interchange the digite number obtained is 9 less than 4 th 29 From ​