[tex]x - y = 2 \: \: \: | \times 2\\ 3x + 2y = 31 \\ \\ 2x - 2y = 4 \\ 3x + 2y = 31 \\ \\ 2x + 3x - 2y + 2y = 31 + 4 \\ 5x = 35 \\ x = 35 \div 5 \\ x = 7 \\ \\ 7 - y = 2 \\ y = 7 - 2 \\ y = 5[/tex]
Ответ: ( 7 ; 5 )
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[tex]x - y = 2 \: \: \: | \times 2\\ 3x + 2y = 31 \\ \\ 2x - 2y = 4 \\ 3x + 2y = 31 \\ \\ 2x + 3x - 2y + 2y = 31 + 4 \\ 5x = 35 \\ x = 35 \div 5 \\ x = 7 \\ \\ 7 - y = 2 \\ y = 7 - 2 \\ y = 5[/tex]
Ответ: ( 7 ; 5 )