60 is to be divided into two parts such that the sum of 10 times the first and 22 times the second is 780 . the bigger part is :
"explanation : let the two parts be ( 60 - x ) and x . then , 10 ( 60 - x ) + 22 x = 780 = > 12 x = 180 = > x = 15 . bigger part = ( 60 - x ) = 45 . answer : b ) 45"
subtract(60, divide(subtract(780, multiply(60, 10)), subtract(22, 10)))