O
x°
51°
58°
Q
P
51°
58°
m∠MNO = m∠NMP because they are alternate interior angles.
m∠NOM = m∠OMQ because they are alternate interior angles.
m∠NMP+ x + m∠OMQ = 180° because the three angles form a straight line.
So the value of x must be ???
°