Question 764120
Now:
w=3+3d


Now Plus 3 years:
w+3=10+2(d+3)


More than one way to continue.  
The "hence" equation,
w=-3+10+2d+6
w=13+2d

3+3d=w=13+2d
3+d=13
{{{highlight(d=10)}}} meaning {{{highlight(w=33)}}}