<PRE><B>Question 23111</B>
Let x = angle B since it is at the end of the first sentence and because angle A is described in terms of angle B.  Therefore, let x = angle B
2x = angle A
4x +12 = angle C


The equation is that the sum of the three angles is 180 degrees.

x+ 2x + 4x + 12 = 180
7x + 12 = 180
7x = 168

{{{7x/7= 168/7}}}
{{{x= 24}}} degrees = Angle B
{{{2x = 48}}} degrees = Angle A
{{{4x + 12 = 108 }}} degrees = Angle C


Check:  24+48+108 = 180 degrees
It checks!


R^2 at SCC</PRE>