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14n + 224 = 420 + 224
14n + 224 = 644
14n = 644 - 224
14n = 420
n = 420 : 14
n = 30
14 x (30 + 16) = (14 x 30) + (14 x 16)
14 x 46 = 420 + 224
644 = 644
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