# 59 3x + 10 = 5x -90 because they are vertical angles and vertical angles are congruent. Solve for x 3x + 10 = 5x - 90 Subtract 3x from both sides 10 = 2x -90 Add 90 to both sides 100 = 2x Divide by 2 50 = x Either of these angles with theta will add to 180. 3(50)+ 10 + theta = 180 160 + theta = 180 Subtract 160 Theta = 20 # 60 Again 3x -20 =2x Subtracting 3x from both sides -20 = -x Divide by -1 x = 20 2(20) + theta = 180 40 + theta = 180 Theta = 140
