4х-3у=-2 |*5
-3х+5у=1 |*3
20x-15у=-10
+
-9х+15у=3
11х =-7
х=-7/11
4*(-7/11)-3у=-2
-3у=-2+28/11
-3у=6/11
у=6/11 :(-3)
у=-2/11
ответ: х=6/11; у=-2/11.
4х-3у=-2
-3х+5у=1
12х-9у=-6
-12х+20у=4
11у=-2
-3х+5*(-2/11)=1
-3х=1+10/11
-3х=1 и 10/11
4х-3у=-2 |*5
-3х+5у=1 |*3
20x-15у=-10
+
-9х+15у=3
11х =-7
х=-7/11
4*(-7/11)-3у=-2
-3у=-2+28/11
-3у=6/11
у=6/11 :(-3)
у=-2/11
ответ: х=6/11; у=-2/11.
4х-3у=-2
-3х+5у=1
12х-9у=-6
-12х+20у=4
11у=-2
у=-2/11
-3х+5*(-2/11)=1
-3х=1+10/11
-3х=1 и 10/11
х=-7/11