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olga nikolaevna [1]
3 years ago
15

Help question is in attachment

Mathematics
2 answers:
dlinn [17]3 years ago
5 0

Answer:

x° = 19°

Step-by-step explanation:

=  >  123 \degree + 3x \degree = 180 \degree \\  \\  =  > 3x\degree = 180\degree - 123\degree \\  \\  =  > 3x\degree = 57\degree \\  \\  =  > x\degree =  (\frac{57}{3} )\degree \\  \\  =  > x\degree = 19\degree

sweet [91]3 years ago
3 0

Answer:

As the angles are supplementary, their sum is 180

123 + 3x = 180

3x = 57

x = 19

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