Respuesta :
The answer is 5 books.
a0 - number of book sold Monday
a1 - number of books sold Tuesday
a2 - number of books sold Wednesday
On Tuesday sold twice than Monday -> a1 = 2a0
On Wednesday 6 fewer books than Tuesday -> a2=a1-6
during three days sold 19 books -> a0+a1+a2 = 19
a1=2a0; a2=a1-6;--> a2=2a0-6
a0+a1+a2 = 19--> a0+2a0+2a0-6 =19
that is 5a0-6=19 =>5a0=19+6 = 25
5a0=25==>a0=25/5 = 5
So the answer is 5 books
Answer:
the answer is 5m then 6 then 1
Step-by-step explanation: