Answer: 55
Step-by-step explanation:
Angles 1 and 4 are vertical angles and angles 2 and 3 are vertical angles. Vertical angles are congruent. Therefore, angle 1 is congruent to angle 4 and angle 2 is congruent to angle 3. Angles 1 and 2 form a linear pair, as do angles 3 and 4. Linear pairs must always add up to 180 because they are supplementary and form a line. Angle 2 is 125, so angle 3 is 125. Angle 3 and Angle 4 must equal 180, so you do 125 + x = 180. So, x = 55.
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