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252n-252+119+7n=84+36n+6
252n+7n-36n=252-119+84+6
223n=223
n=1
(36n-36+17+n)14=12(6n+15)
(37n-19)14=72n+180
518n-126-72n=180
446n=180+126
446n=446
n= 446/446
n=1