You would do 78/4 which equals 19.5. Hope this helps!
Answer:
and 
Step-by-step explanation:
If two equations are given, we can solve one of the equation in terms of single variable and put it in the other equation which will further give the value of x and y.
For the given equations:
Equation:1
Equation:2
Solving equation multiply equation 2 with 4 on both the sides
Equation 3
Subtracting Equation:3 from Equation:1

Putting value of 'y' in Equation:2 which will give the value of x

Ella hizo 120 tarjetas al venderlas hizo $90 y menos lel beneficio son $48
I personally think Natalie's bill is the greatest because $24.25 × 10 =x