I can’t get down what the teacher is saying when he explains how to do it. Can someone help?

There are 3 angles on a straight line : WYX, WYV, VYZ

now,

given, (WYV = 6x - 12) , (VYZ = x + 16) ,

(WYX = VYZ) { They are opposite angles}

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Sum of all the angles will be 180°

WYX + WYV + VYZ = 180°

(6x - 12) + (x + 16) + (x + 16) = 180°

6x - 12 + 2x + 32 = 180°

8x + 20 = 180°

8x = 180° - 20°

8x = 160°

x = 160°/8 = 20°

now,

put the value of 'x' in WYV i.e. (6x - 12) = (6*20 - 12) ° = (120 - 12) ° = 108°

hence, WYV = 108°

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step-by-step explanation:

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step-by-step explanation: