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2 2/3(1 1/2a-2 1/4)+1 1/5*(2 1/2a-5/6)
2 1/3(6/7m+3)-1 2/3(3/5m-3)
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Ответил zhenyaM2002
0
1)
![2 frac{2}{3} *(1 frac{1}{2} a - 2 frac{1}{4} ) + 1 frac{1}{5} *(2 frac{1}{2} a - frac{5}{6} )= \ \
= frac{8}{3} * frac{3}{2} *a+ frac{8}{3} *(- frac{9}{4} ) + frac{6}{5} * frac{3}{2}*a + frac{6}{5} *(-frac{5}{6} ) = \ \
= frac{4*1}{1*1} * a - frac{2*3}{1*1} + frac{3*3}{5*1} *a - 1 = \ \
= 4a - 6 + 1 frac{1}{5} a - 1 = 5 frac{1}{5} a - 7 = \ \
= 5.2a - 7](https://tex.z-dn.net/?f=2+frac%7B2%7D%7B3%7D+%2A%281+frac%7B1%7D%7B2%7D+a+-+2+frac%7B1%7D%7B4%7D+%29+%2B+1+frac%7B1%7D%7B5%7D+%2A%282+frac%7B1%7D%7B2%7D+a+-++frac%7B5%7D%7B6%7D+%29%3D++%5C++%5C+%0A%3D+frac%7B8%7D%7B3%7D++%2A++frac%7B3%7D%7B2%7D+%2Aa%2B++frac%7B8%7D%7B3%7D+%2A%28-+frac%7B9%7D%7B4%7D+%29+%2B++frac%7B6%7D%7B5%7D+%2A+frac%7B3%7D%7B2%7D%2Aa+%2B+frac%7B6%7D%7B5%7D++%2A%28-frac%7B5%7D%7B6%7D+%29+%3D+%5C++%5C%0A%3D++frac%7B4%2A1%7D%7B1%2A1%7D+%2A+a+++-++frac%7B2%2A3%7D%7B1%2A1%7D++%2B++frac%7B3%2A3%7D%7B5%2A1%7D+%2Aa+-++1+%3D+%5C++%5C+%0A%3D++4a++-+6+%2B+1+frac%7B1%7D%7B5%7D+a+-+1+%3D+5+frac%7B1%7D%7B5%7D+a+-+7+%3D+%5C++%5C+%0A%3D+5.2a+-+7 "2 frac{2}{3} *(1 frac{1}{2} a - 2 frac{1}{4} ) + 1 frac{1}{5} *(2 frac{1}{2} a - frac{5}{6} )= \ \
= frac{8}{3} * frac{3}{2} *a+ frac{8}{3} *(- frac{9}{4} ) + frac{6}{5} * frac{3}{2}*a + frac{6}{5} *(-frac{5}{6} ) = \ \
= frac{4*1}{1*1} * a - frac{2*3}{1*1} + frac{3*3}{5*1} *a - 1 = \ \
= 4a - 6 + 1 frac{1}{5} a - 1 = 5 frac{1}{5} a - 7 = \ \
= 5.2a - 7")
2)
![2 frac{1}{3} *( frac{6}{7} m + 3) - 1 frac{2}{3} *( frac{3}{5} m - 3) = \ \
= frac{7}{3} * frac{6}{7} *m + frac{7}{3} * frac{3}{1} - frac{5}{3} * frac{3}{5} *m - frac{5}{3} *(- frac{3}{1} ) = \ \
= 2m + 7 - m + 5 = (2m -m) +(7+5) = \ \
= m +12](https://tex.z-dn.net/?f=2+frac%7B1%7D%7B3%7D+%2A%28+frac%7B6%7D%7B7%7D+m+%2B+3%29++-+1+frac%7B2%7D%7B3%7D+%2A%28+frac%7B3%7D%7B5%7D+m+-+3%29+%3D+%5C++%5C+%0A%3D++frac%7B7%7D%7B3%7D+%2A+frac%7B6%7D%7B7%7D+%2Am++%2B++frac%7B7%7D%7B3%7D+%2A+frac%7B3%7D%7B1%7D++-++frac%7B5%7D%7B3%7D+%2A+frac%7B3%7D%7B5%7D+%2Am+-+frac%7B5%7D%7B3%7D+%2A%28-+frac%7B3%7D%7B1%7D+%29+%3D++%5C++%5C+%0A%3D+2m++%2B+7+-+m+%2B+5+%3D+%282m+-m%29+%2B%287%2B5%29+%3D++%5C++%5C+%0A%3D+m+%2B12 "2 frac{1}{3} *( frac{6}{7} m + 3) - 1 frac{2}{3} *( frac{3}{5} m - 3) = \ \
= frac{7}{3} * frac{6}{7} *m + frac{7}{3} * frac{3}{1} - frac{5}{3} * frac{3}{5} *m - frac{5}{3} *(- frac{3}{1} ) = \ \
= 2m + 7 - m + 5 = (2m -m) +(7+5) = \ \
= m +12")
2)
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