Question 13284
From this we have 
A=3B and A=C+16
So B=A/3 and C=A-16
We know 180=A+B+C
So, 180=A + (A/3) + (A-16)
180=A(1+(1/3)+1)-16
180=A(7/3)-16
196=A(7/3)
A=84
So B=A/3=84/3=28
and C=A-16=84-16=68
Check 68+28+84=180