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Please help me with number six

Please help me with number six-example-1

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w = 2x = 2( (y)/(3)) \\ v = 2w = 2 * 2( (y)/(3) ) \\ v + w + x + y = 180 \\ (4)/(3) y + (2)/(3) y + (y)/(3) + y = 180 \\ y( (4)/(3) + (2)/(3) + (1)/(3) + 1) = 180 \\ y = (180)/(())
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