What is the solution to the equation - 13+x = - 4?

a. - 17

b. 9

c. - 9

d. 17

-13+9=-4

When you add a positive number to a negative number the answer will get closer to 0 and then progress up in positive numbers. In this case we are finding which of the numbers equals - 4 when added to - 13. Remember, if you add a negative to a negative you will get a negative.

-13+-17=-30 This is the wrong answer.

-13+-9=-21 This is the wrong answer.

-13+17=4 This is the wrong answer. (This is positive 4 we are trying to find - 4)

-13+9=-4 This is the right answer

Therefore X=9