10x-31=54 +31 +31 10x=90 x= 9 10 R T S 3. If mAD = 85° and mBC= 31°, find the value of x. D 2. If mJ 4.1 31 B C A 85 D (13x-21) 5. If mUV = (8x-17) and mWV = (5x + 52)°, find mWV. U W V

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