5x9=(5x3)+(5x___)what is the missing number

Question

What is the missing number and how do you find the missing number

Answer 1

First of all you want to work on one side of the equation at a time. 

1) 5*9=45

2) This will then give you 45=(5*3)+(5*_)

3) Next, you will continue to solve what you do know: 5*3=15

4) This will then give you 45=15+(5*_)

5) Now we will solve for the blank spot. You need to subtract 15 from both sides of the equation, giving you  30=(5*_)

6) Last, we will divide 5 from both sides and this will give you the answer of 6.