a and b can do a piece of work in 6 2 / 3 days and 5 days respectively . they work together for 2 days and then a leaves . in how many days after that b will complete the work alone .
"explanation : 3 / 20 * 2 + ( 2 + x ) / 5 = 1 x = 1 â ½ days answer : b"
multiply(5, subtract(2, add(inverse(5), inverse(add(6, divide(2, 3))))))