Answer:
D.
Step-by-step explanation:
To solve the system of equations below, Maria isolated the variable y in the first equation and then substituted it into the second equation.
First equation is
To isolate y we divide both sides by 3
Now substitute 4x for y in second equation
this equation is in option D
No
The sum of the digits is 40 which is not divisible by 9, so it is not divisible by 9