1. mr b

Mr brown is four times as old as his son robin. in 6 years time he will be three times old as robin. find robins age?

4x = 3x + 6?

help?

2. I would say

$\frac{y}{x}=4 \Rightarrow y=4x$

and

$\frac{y+6}{x+6}=3$

giving

$\frac{4x+6}{x+6}=3$

$4x+6=3(x+6)$

$4x+6=3x+18$

can you take it from here?