Respuesta :

unicorn3125

Answer:

              B. 5

Step-by-step explanation:

x      - the number

x + 10   - the sum of the number and ten

4×(x + 10)    - four times the sum of the number and ten

4×(x + 10) = 60

          ÷4         ÷4

   x + 10 = 15

      -10       -10

     x = 5