Answer
$24^{\circ}; 20^{\circ}; 136^{\circ}$
Work Step by Step
1. Add up all angles and equal it to 180 degrees
$(3x+3) + (4x-8) +(13x+45)= 180^{\circ}$
2. Solve for x:
$20x +40 =180 $
$20x=140$
$x=7$
3. Replace the x to find angles
$3(7)+3=24^{\circ}$
$13(7)+45=136^{\circ}$
$4(7)-8=20^{\circ}$
