crossmultiplication8x-3y=12;5x=2y+7
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\left[x \right] = \left[ \frac{3}{2}+\frac{3\,y}{8}\right][x]=[23+83y]
\left[x \right] = \left[ \frac{7}{5}+\frac{2\,y}{5}\right][x]=[57+52y]
\left[x \right] = \left[ \frac{7}{5}+\frac{2\,y}{5}\right][x]=[57+52y]
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