у=4-3х
5х+4-3х=10
2х=10-4=6
х=6/2=3
у=4-9=-5
х=3
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у=4-3х
5х+4-3х=10
у=4-3х
2х=10-4=6
у=4-3х
х=6/2=3
у=4-9=-5
х=3