if the measure of angle 2 is (5x+12) and angle 3 is (7x-14), what is the measure of angle 1 in degrees?

Answer:35x^2+14x-168

Answer with explanation:

The sum of measures of three angles of triangle is 180°.

→∠1+∠2+∠3=180°

→∠1 + (5x+12) ° + (7x-14) °=180°

→∠1 + (5x+7x) + (12-14) °=180°

→∠1+12 x-2°=180°

→∠1=180°+2°-12 x

→∠1=182°-12 x

That is, Third Angle = 182°-12 x