[tex]ax-4y=?\\a=14\\x=-7\\y=-\frac{1}{4} \\(14)(-7)-4(-\frac{1}{4} ); -4*(-\frac{1}{4})=1 \\-98+1=-97\\[/tex]
Ответ: -97
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[tex]ax-4y=?\\a=14\\x=-7\\y=-\frac{1}{4} \\(14)(-7)-4(-\frac{1}{4} ); -4*(-\frac{1}{4})=1 \\-98+1=-97\\[/tex]
Ответ: -97