the sum of ages of 5 children born 1 years different each is 30 years . what is the age of the elder child ?
"let the ages of children be x , ( x + 1 ) , ( x + 2 ) , ( x + 3 ) and ( x + 4 ) years . then , x + ( x + 1 ) + ( x + 2 ) + ( x + 3 ) + ( x + 4 ) = 30 5 x = 20 x = 4 . x + 4 = 4 + 4 = 8 answer : a"
divide(add(add(add(add(1, const_4), add(1, const_4)), add(const_4, const_4)), 30), 5)