Answer:

Step-by-step explanation:
Given


Required
Find x such that: 
This gives:

Collect like terms


Expand

Factorize

Factor out x - 1

Solve:

Step-by-step explanation:
there should be at least
Answer:
The answer is:
32x+12y
Step-by-step explanation:
Because 4 times 8 =32 and 4 times 3 =12
All you need to do is 16 so she needs to work 16 hours to get $115.