(15-х)*50-36=314;
(15-х)*50=314+36
(15-х)*50=350
15-х=350:50
15-х=7
х=15-7
х=8
15*50-50х-36=314
714-50х=314
-50х=-400
(937-54х)*13198=49
12366526-712692х=49
-712692х=49-12366526
-712692х=-12366477
х=-12366477/(-712692)
