Question 99624
Francisco = x
Oriana = x+5
Sum of ages is 27
so 
{{{(x)+(x+5)=27}}}
now solve for x
{{{(x)+(x+5)=27}}}
{{{x+x+5=27}}} simplify
{{{2x+5=27}}}  combine like terms
{{{2x=27-5}}}  isolate term with x
{{{2x=22}}}    divide both sides by 2
{{{x=11}}}

Now that you have solved for x you know Francisco is 11
use that to find Oriana's age.