14 *(3х-15)=253
14 * 3х - 14 * 15 = 253
42х - 210 = 253
42х = 253 + 210
42х = 463
х = 463 : 42
х = 11целых 1/42
8*(112-5х)=816
896 - 40х = 816
40х = 896 - 816
40х = 80
х = 80 : 40
х = 2
14 *(3х-15)=253
14 * 3х - 14 * 15 = 253
42х - 210 = 253
42х = 253 + 210
42х = 463
х = 463 : 42
х = 11целых 1/42
8*(112-5х)=816
896 - 40х = 816
40х = 896 - 816
40х = 80
х = 80 : 40
х = 2