Answer :

Answer:

60

Step-by-step explanation:

A straight line is 180 degrees

180 = (x+126) - (x+66)

180-126-66 = -12 = 2x

x = -12/2 = -6

x+66 = -6+66 = 60

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Rewritten by : Barada

Answer:

x + 66 = 60°

Step-by-step explanation:

x + 66 and x + 126 are same- side interior angles and sum to 180°

sum the 2 angles, equate to 180 and solve for x

x + 66 + x + 126 = 180

2x + 192 = 180 ← subtract 192 from both sides

2x = - 12 ← divide both sides by 2

x = - 6

Then

x + 66 = - 6 + 66 = 60°