Решите уравнения:(5х+2х)*14=294          (19х+6х):35=5(12у-5у):4=21          234:(21у-8у)=3

(5х+2х)*14=294   7х*14=2947х=294:147х=21х=21:7х=3(12у-5у):4=21 7y:4=217y=21*47y=84y=84:7y=12(19х+6х):35=525x:35=525x=35*525x=175x=175:25x=7234:(21у-8у)=3234:13y=313y=234:313y=78y=78:13y=6

(5х+2х)*14=2947х*14 =294;   98х=294;  х=294 /98=3(12у-5у):4=217у/4 = 21; 7у = 84; у= 12(19х+6х):35=525х /35 = 5;  25х = 175; х = 175/ 25 = 7234:(21у-8у)=3234/13у=313у = 234 /313у = 78; у = 78/13 = 6