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kifflom [539]
4 years ago
12

The question is in the picture​

Mathematics
2 answers:
oee [108]4 years ago
7 0

Answer:

y = 54

Step-by-step explanation:

Two of the sides are congruent, so the angles that are facing the two sides are also congruent, so:

3(x + 7) = 63

3x + 21 = 63

3x = 42

x = 14

A triangle equals 180 degrees,  and input 14 into the equation, so:

3(14 + 7) + 63 + y = 180

3(21) + 63 + y = 180

63 + 63 + y = 180

126 + y = 180

y = 54

Ivenika [448]4 years ago
4 0

Answer:

the answer is angle y = 54. ........

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