The sum of nine times a number and six is seven

Answer 1

Hi Ang,

Let's use the variable, x , to represent the unknown number. The word "sum" indicates addition and the word, "is" , can be represented with an equal sign.

For this problem, you would have:

9x + 6 = 7

You can solve this equation to find the missing number, x, using inverses operations as follows:

9x + 6 - 6 = 7 - 6

9x = 1

9x/9 = 1/9

x = 1/9

The missing number is the fraction 1/9.