5х+у=3
9х+2у=4
у=3-5х
9х+2(3-5х)=4
9х+6-10х=4
-х=-2
х=2
у=3-5•2
у=3-10
у=-7
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5х+у=3
9х+2у=4
у=3-5х
9х+2у=4
9х+2(3-5х)=4
9х+6-10х=4
-х=-2
х=2
у=3-5х
х=2
у=3-5•2
у=3-10
у=-7
у=-7
х=2