Ответ:
[tex]-\frac{7}{12} y+\frac{2}{3} y= -\frac{7}{12} y+\frac{8}{12} y=\frac{-7+8}{12}y=\frac{1}{12} y[/tex]
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Ответ:
[tex]-\frac{7}{12} y+\frac{2}{3} y= -\frac{7}{12} y+\frac{8}{12} y=\frac{-7+8}{12}y=\frac{1}{12} y[/tex]