five times the sum of a number and 4 is -15

Question

want to check my answer!

Answer 1

Translate:

"five times the sum of a number and 4 is -15"

   5      *              (    x                    +   4)    = -15

   5x + 20 = -15                  [distribute the 5]

    5x = -35                    [subtract 20 from each side]

      x = -7                     [divide both sides by 5]

 

Checking:

  Is   5*(-7 + 4) = -15   ?

        5*(-3) = -15      ?

         -15    =  -15     ?  yes

 

Answer 2

the number is N.  SUM of a number and four is addition: (N+4).   Five times that is 5(N+4).  Therefore five times the sum of n and 4 is -  produces the equation  5(N+4) =  -15       Divide both sides by five then subtract four from both sides.  N =  -7            

                                                         5(N+4) /5  =  -15/5              .

                                                              n + 4    =  -3                                                              .    

                                                              n          =  -3 - 4   =  -7                                              .

Answer 3

Write as an equation and solve:

5(x+4) = -15

5x+20 = -15

x = -7