To simplify the expression 3 + 22 – 6 + 28 – 42, we begin by performing the operations step by step, following the order of operations.
1. First, we add 3 + 22, which equals 25.
2. Next, we subtract 6 from 25: 25 – 6 = 19.
3. Then we add 28 to the result: 19 + 28 = 47.
4. Finally, we subtract 42 from 47: 47 – 42 = 5.
Therefore, the simplified result of the expression 3 + 22 – 6 + 28 – 42 is 5.