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swat32
3 years ago
14

What is the measure of

Mathematics
1 answer:
djyliett [7]3 years ago
3 0
Since opposite angles are equal, 8x+12=5x+57. Subtracting 5x as well as 12 from both sides, we get 3x=45. . Dividing both sides by 3, we get x=15. Plugging x=15 into 5x+57, we get 5*15+57=75+57=132
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