Answer:
(3x + 5) + (x +3) = 180 sum of angles on a
straight line
3x + 5 + x + 3 = 180
3x + x + 5 + 3 = 180
4x + 8 = 180
4x = 180 - 8
x = 172/4
= 43
The angles 3x + 5 and x + 3 are
3x + 5 = 3(43) + 5 = 129 + 5 = 134
x + 3 = 43 + 3 = 46
