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matrenka [14]
4 years ago
13

Find the value of each variable. Write the equation and solve showing ALL the work.

Mathematics
1 answer:
Wittaler [7]4 years ago
3 0

Answer:

x = 96°

y = 102°

Step-by-step explanation:

Angles on a straight line add up to 180

78 + y = 180

y = 180 - 78

y = 102

Angles in a quadrilateral add up to 360

78 + 90 + x + x = 360

78 + 90 + 2x = 360

168 + 2x = 360

2x = 360 - 168

2x = 192

x = 192/2

x = 96°

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