Answers

2014-01-13T01:46:57+08:00
Let (180-x) = the suplement
 4(90-x) = complement
Solution:
 180-x= 4(90-x)
 180-x= 360-4x
 -x+4x = 360-180
 3x=180
 x=60


the answer is 60.
0