Calculate the value of the expression: {20 minus [7 minus (3 minus 2)] plus one-third of 4.2} divided by 1.4.

Explanation

First, simplify inside the brackets: (3 minus 2) equals 1, so [7 minus 1] is 6. Next, calculate one-third of 4.2, which is 1.4. Substitute these back: (20 minus 6 plus 1.4) divided by 1.4. This equals (15.4) divided by 1.4, resulting in 11.