Question

If a+2b is equal to 125 percent of 4b, what is the value of a/b?

Answer 1

if you can get a in terms of b (or vice versa) than you can sub it into the 2nd equation.
\[a+2b = 1.25(4b)\]\[a=5b-2b\]\[a=3b\]

Can you proceed from here?

Answer 2

Still a bit confused @Mathmuse

Answer 3

now you sub what 'a' is equal to into the equation:\[\frac{a}{b}=\frac{3b}{b}\]
you should be able to simplify this