5 1/7 - (4 3/7-6/7)плиииииииииз

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[latex]5 \frac{1}{7} -(4 \frac{3}{7} - \frac{6}{7} )=5 \frac{1}{7} -(3 \frac{10}{7} - \frac{6}{7} )=4 \frac{8}{7} - 3 \frac{4}{7} = 1 \frac{4}{7} [/latex]