What number divided by -7 is equal to -15?

Hint: In this problem, we have to find the number, which is when divided by -7, gives -15. We can now write a mathematical expression, assuming the unknown number as x. We can divide the unknown x by -7 and equate it to -15, we can then multiply -7 on both the left hand side and the write hand side of the equation and simplify it to get the unknown number value.

Complete step by step answer:
Here we have to find the number, which is when divided by -7, gives -15.
We can now write the mathematical expression assuming the unknown number as x. We can divide the unknown x by -7 and equate it to -15.
\[\Rightarrow \dfrac{x}{-7}=-15\]
We can now multiply -7 on both the left-hand sides and the right-hand side in the above step, we get
\[\Rightarrow x=-15\times -7\]
We can now multiply the terms in the right-hand side, by multiplying the two negative signs, which gives positive and multiplying the numbers, we get
\[\Rightarrow x=105\]

Therefore, the number 105 divided by -7 is equal to -15.

Note: Students make mistakes while multiplying the negative terms. We should always remember that, if we multiply two negative signs, we get a positive result. We should also know multiplication tables to find the value for these types of problems. We can just multiply the denominator and the resulting term after the equal sign to find the numerator from the division.