Respuesta :

desinablessing15

Answer:

don't understand

but mean = summation x

total number

15=7+4+5+2x+11

5

15=27+2x

5

multiply both sides by 5

15×5=26+2x ×5

5

75=26+2x

75-26=2x

49=2x

2. 2

x= 24.5