X= 20 y= 100
I hope it helped. Give Brainly if it help
Bob charges $140
Andy charges $135
Andy is cheaper
Yes, you're right! The first step is rewriting the equation as

Subtract
from both sides:

Use the property
to rewrite the equation as

Divide both sides by 

Alternative strategy:
Consider both sides as exponents of e:

Use
to write

Divide both sides by a:

Consider the logarithm base b of both sides:

The two numbers are the same: you can check it using the rule for changing the base of logarithms