Question 237430
Hint: Remember that if all of the angles of a triangle are equal, then all of the sides are equal.



So this means that {{{x+3y+2=8}}} and {{{3x-y=8}}}



So all you need to do is solve the system {{{system(x+3y+2=8,3x-y=8)}}} for 'x' and 'y'.