Answer:
a
Step-by-step explanation:
Answer:
A ................................
A+b+c=28x+40=180
—>28x=140
—>x=140/28=5
c=9x-3
—>c=42
Income of the first account after x years:

Income of the second account after x years:

Equating the above tw values we get the equation:

Solving the above equation for x:

Answer 8 years.
2.5 *(10)+15=40
I guess this is the answer :)