Make a list of your family superstitions for good luck and bad luck. Good luck: Eating bus ticket which has the same figure in the beginning and in the end of it. Bad luck: Breaking a mirror.

1 значение. вот так
наверное

Система
2х+3у=4
х-у=3
х+2у=р
система
2х+3у=4
х-у=3
система
2х+3у=4
-2х+2у=-6
   
5у=-2
у=-0,4
2х+3(-0,4)=4
2х-1,2=4
2х=5,2
х=2,6
х=2у=р
2,6+2(-0,4)=р
р=1,8