(−42)−(+3.5)=
To solve this problem, we'll follow these steps:
Step 1: Simplify .
- The fraction simplifies to because both the numerator and the denominator can be divided by 2.
Step 2: Perform the subtraction.
- Now, calculate .
To subtract the numbers, transform into a decimal: .
Thus, the expression becomes:
.
Therefore, the solution to the problem is .