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1 answer:
<h3>Solution:</h3>
- We know, the sum of the angles on a line is 180°.
- Therefore,
(12x+20)°+(7x+8)° = 180°
or, 19x° + 28° = 180°
or, 19x° = 180°-28°
or, 19x° = 152°
or, x = 152° ÷ 19°
or, x = 8
- Therefore, (12x+20)° = (12×8+20)° = (96+20)° = 116°
- We also know that vertically opposite angles are equal.
- So, z° = 116° or, z = 116
<h3>Answer:</h3>
x = 8
z = 116
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