If the two angles form a linear pair, then their degree measures equal 180. We can add the two measures together, set them equal to 180, and solve for x.
2x+20+48x=180
*Combine like terms*
20+50x=180
*Subtract 20 from both sides*
50x=160
*Divide both sides by 50*
x=16/5
Now, plug in 16/5 for x to find the measures of each angle.
2(16/5)+20=26.4
48(16/5)=153.6
Angle 1=26.4 and Angle 2=153.6.
Hope this helps!!