Nine more than 2 times a certain number is 137. Find the number.

Question

Nine more than 2 times a certain number is 137. Find the number

Answer 1

Once you learn to translate the words and phrases of a word (story) problem into concise, precise math expressions and operations, the math is easy.

 

"Nine more than 2 times a certain number is 137"

    9       +          2   *          x                 =   137

 

Now, make a table of the ways to translate words:

    "is"      means      =

   "more than"           +

   "times"                 *

   "of"            usually means multiply

   "less than"            -

. . .

 

For example, I like to write:

       "The number of red marbles (R) is 6 less than the number of blue marbles (B)"

                                              R      =        -6                  +                         B

Answer 2

2x + 9 = 137, solve for x.

 

2x = 137 - 9

 

2x = 128

 

x = 128 / 2

 

x = 64

 

 

Now, let's check the solution:

 

2(64) + 9 = 137

 

128 + 9 = 137

 

137 = 137