Answer:
x = 129°
Step-by-step explanation:
The sum of the angle with a measure of 51° and x° is equal to 180° because they are supplementary angles. Therefore:
m < 51° + x° = 180°
Subtract m < 51° from both sides to isolate x°:
m < 51° - m < 51° + x° = 180° - m < 51°
x° = 180° - m < 51°
x° = 129°
Therefore, m < x° = 129°
