I'm assuming this is a system of equations you want solved so,
x = -y + 3
-2(-y+3)+4y = 6
2y - 6 + 4y = 6
6y = 12
y = 2
x + 2 = 3
x = -1
(-1,2)
She would have to shop there 10 time to get the 100% back.
The answer would be letter B. You can see that the price of the demanded products as the time passes by decreases. So the answer is letter B.
Tell me if the answer is true or wrong
I would say the answer would be B
