## Trigonometry (10th Edition)

$24^{\circ}; 20^{\circ}; 136^{\circ}$
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 $3(7)+3=24^{\circ}$ $13(7)+45=136^{\circ}$ $4(7)-8=20^{\circ}$