Решите уравнение (1 - 7/10) х = 2 1/4 (1/4 + 1/5) х = 1 4/5 (3 1/8 + 1 3/4) х = 2 1/6 (2 1/12 - 1 5/6) х =3/4 РЕШИТЕ ХОТЯБЫ ПОЛОВИНУ ЗАРАНИЕ СПАСИБО?
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1) ![1) (1- \frac{7}{10} )x=2 \frac{1}{4} 1) (1- \frac{7}{10} )x=2 \frac{1}{4}](https://tex.z-dn.net/?f=1%29+%281-+%5Cfrac%7B7%7D%7B10%7D+%29x%3D2+%5Cfrac%7B1%7D%7B4%7D+)
![1- \frac{7}{10} = \frac{3}{10} 1- \frac{7}{10} = \frac{3}{10}](https://tex.z-dn.net/?f=1-+%5Cfrac%7B7%7D%7B10%7D+%3D+%5Cfrac%7B3%7D%7B10%7D+)
![\frac{3}{10} x= \frac{9}{4} \frac{3}{10} x= \frac{9}{4}](https://tex.z-dn.net/?f=+%5Cfrac%7B3%7D%7B10%7D+x%3D+%5Cfrac%7B9%7D%7B4%7D+)
![x= \frac{9}{4} : \frac{3}{10} = \frac{9}{4} * \frac{10}{3} = \frac{15}{2} x= \frac{9}{4} : \frac{3}{10} = \frac{9}{4} * \frac{10}{3} = \frac{15}{2}](https://tex.z-dn.net/?f=x%3D+%5Cfrac%7B9%7D%7B4%7D+%3A+%5Cfrac%7B3%7D%7B10%7D+%3D+%5Cfrac%7B9%7D%7B4%7D+%2A+%5Cfrac%7B10%7D%7B3%7D+%3D+%5Cfrac%7B15%7D%7B2%7D+)
x=7.5
2)![(\frac{1}{4} + \frac{1}{5} )x=1 \frac{4}{5} (\frac{1}{4} + \frac{1}{5} )x=1 \frac{4}{5}](https://tex.z-dn.net/?f=+%28%5Cfrac%7B1%7D%7B4%7D+%2B+%5Cfrac%7B1%7D%7B5%7D+%29x%3D1+%5Cfrac%7B4%7D%7B5%7D+)
![\frac{1}{4} + \frac{1}{5} = \frac{1*5}{4*5} + \frac{1*4}{5*4} = \frac{5}{20} + \frac{4}{20} = \frac{9}{20} \frac{1}{4} + \frac{1}{5} = \frac{1*5}{4*5} + \frac{1*4}{5*4} = \frac{5}{20} + \frac{4}{20} = \frac{9}{20}](https://tex.z-dn.net/?f=+%5Cfrac%7B1%7D%7B4%7D+%2B+%5Cfrac%7B1%7D%7B5%7D+%3D+%5Cfrac%7B1%2A5%7D%7B4%2A5%7D+%2B+%5Cfrac%7B1%2A4%7D%7B5%2A4%7D+%3D+%5Cfrac%7B5%7D%7B20%7D+%2B+%5Cfrac%7B4%7D%7B20%7D+%3D+%5Cfrac%7B9%7D%7B20%7D+)
![\frac{9}{20} x=1 \frac{4}{5} \frac{9}{20} x=1 \frac{4}{5}](https://tex.z-dn.net/?f=+%5Cfrac%7B9%7D%7B20%7D+x%3D1+%5Cfrac%7B4%7D%7B5%7D+)
![x= \frac{9}{5} : \frac{9}{20} = \frac{9}{5}* \frac{20}{9} =4 x= \frac{9}{5} : \frac{9}{20} = \frac{9}{5}* \frac{20}{9} =4](https://tex.z-dn.net/?f=x%3D+%5Cfrac%7B9%7D%7B5%7D+%3A+%5Cfrac%7B9%7D%7B20%7D+%3D+%5Cfrac%7B9%7D%7B5%7D%2A+%5Cfrac%7B20%7D%7B9%7D++%3D4)
x=4
x=7.5
2)
x=4
dimon4ikkkk:
спасибки :) :)
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