Let x be Beth's age, since Ana is 5 years older, then
x+5 would be Ana's age.
In five (5) years, Beth's age will be 5+x and Ana's age will be 5+(x+5). So,
Beth after 5 years = x+5
Ana after 5 years = x+10
The product of their ages 5 years after is 1.5 times the product of their present ages. Thus,
[tex](x+10)(x+5)=1.5x(x+5)[/tex]
[tex] x^{2} +15x+50=1.5 x^{2} +7.5x[/tex]
[tex] x^{2} -1.5 x^{2} +7.5x+50=0[/tex]
([tex]-0.5 x^{2} +7.5x+50=0[/tex] )(-2) (Multiply both sides by -2)
[tex] x^{2} -15x-100=0[/tex] (Factoring)
[tex](x-20)(x+5)=0[/tex]
x=20; x=-5 (x=-5 is rejected since we have no negative age)
So, the age of Beth now is 20; furthermore, Ana's age (x+5=20+5=25) is 25..