


add 15 to both sides:


subtract 6x from both sides:


Both sides are equal : true for all x
Answer D
hope this helps!
Answer:
-11/20 or -0.55
Step-by-step explanation:
1/5 = 4/20
3/4 = 15/20
4/20 - 15/20 = -11/20
Answer:
7 gallons were used for city driving.
Step-by-step explanation:
I am going to solve this question by a system of equations.
I am going to say that:
x is the number of gallons driven in the city.
y is the number of gallons driven in the highway.
19 gal of gas
This means that 
Carole's car averages 13.2 mi/gal in city driving and 25.3 mi/gal in highway driving. If she drove a total of 396.0 mi.
This means that 
How many of the gallons (to the nearest gallon) were used for city driving?
This is x
From the first equation, i will have

Replacing in the second equation






7 gallons were used for city driving.