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