6х+5у=3
-6х-6у=-8
6х+5у-6х-6у=-8+3
-у=-5
у=5
3х+3*5=4
3х+15=4
3х=4-15
3х=-11
х=-11:3
х=-3 2/3
6х+5у=3 *3
3х+3у=4 *-5
18х+15у=9
-15х-15=-20
3х=-29
х=-9 2/3
6х+5у=3
-6х-6у=-8
6х+5у-6х-6у=-8+3
-у=-5
у=5
3х+3*5=4
3х+15=4
3х=4-15
3х=-11
х=-11:3
х=-3 2/3
6х+5у=3 *3
3х+3у=4 *-5
18х+15у=9
-15х-15=-20
3х=-29
х=-9 2/3