Question 1004818
Albert is A years old.  Mom is M years old.<P>
Six years ago:  A = M/5<P>
Now:  3*(A+6) = M+6<P>
Substitute M/5 for A in the second equation.<P>
3*(M/5 + 6) = M+6
3M/5 + 18 = M+6
12 = M - 3M/5 = 5M/5 - 3M/5 = 2M/5<P>
60 = 2M<P>
30 = M<P>
The question asks how old is Albert's mom.  Remember, we called M her age 6 years ago.  So now her age is 30+6 = 36.