Question 1120663
<br>
Since the problem asks for Emily's weight, it's probably easiest to let her age be our variable.  So<br>
let x = Emily's age
then x+2 = Sophie's weight
and x-3 = Phoebe's weight<br>
Then, since their combined weight is 131kg,<br>
{{{x+(x+2)+(x-3) = 131}}}
{{{3x-1 = 131}}}
{{{3x = 132}}}
{{{x = 34}}}<br>
Answer: Emily weighs 34kg