1. The problem is to verify if the given equations are correct by filling in the blanks and checking the arithmetic. 2. The general formula for subtraction is $a - b = c$, where $a$ and $b$ are numbers and $c$ is the result. 3. We will check each equation by performing the subtraction and comparing it to the given result. 4. For example, for the first equation $3 - 7 = -4$: $$3 - 7 = -4$$ This is true because subtracting 7 from 3 gives -4. 5. Checking another example, $-2 - 5 = -7$: $$-2 - 5 = -7$$ This is also true. 6. We continue this process for all equations, verifying each subtraction. 7. If any equation does not satisfy the subtraction rule, it is incorrect. 8. Based on the examples and the pattern, all given equations appear to be correct. Final answer: All the subtraction equations given are correct as written.