The angles will sum to 180° ...so...
[ 5x + 9 ] + [ 2x + 11 ] = 180 simplify
7x + 20 = 180 subtract 20 from both sides
7x = 160 divide both sides by 7
x = 160/7 ≈ 22.86°
So....the frist angle = 5(22.6) + 9 ≈ 122° and the second angle ≈ 180 - 122 ≈ 58°
