3 years ago

Which one is the correct one

Mathematics

1 answer:

kenny6666 [7]3 years ago

8 0

Step-by-step explanation:

Sum of opposite angles are supplementary,

x + 60 + 3x = 180

4x + 60 = 180

4x = 180 - 60

4x = 120

x = 120 / 4

x = 30

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