Answer:

Step-by-step explanation:
The reason is because you don't know the Inital amount she bought and because she visits two days in a row you would multiply
1/3(21 - 3a) = 6 - a
7 - a = 6 - a
7 = 6
Therefore, the equation has no solution.
Answer:
The slope is 2
Step-by-step explanation:
From the y-intercept which is 1, to get to the next point, you would go up 2 and 1 right which is 2/1, and 2/1 is technically just 2.
Hope this helps and pls do mark me brainliest if you can:)
1) 1/5 (x-25) = 7
1/5x - 5 = 7
Add five to both sides
1/5x = 12
Divide both sides by 1/5
x = 60