Answer:
Mr. Perkins changed the oil in his car. He bought. 6 liters of oil. He put 4,500 ml in his car.
Step-by-step explanation:
There are 60 Country CDs and 136 Rock CDs.
Rock and country CDs = 196
Country CD = x
Rock CD = x + 76
Country CD + Rock CD = 196
x + (x + 76) = 196
2x = 196 - 76
2x = 120
2x / 2 = 120 / 2
x = 60 * number of Country CD
Rock CD = x + 76 = 60 + 76 = 136
To check:
Country + Rock = 196
60 + 136 = 196
196 = 196
-1
because there is a pattern..
6 / 2 = 3
8 / 2 = 4
-2 / 2 = -1
I believe the first one 12+ 6 + 15 = 12 + 15 + 6 is your answer, since you are just moving things around
hope this helps
