search points attachment profile arrow left arrow right star heart verified symbols equation arrow-down question mark check menu accountancyadministrationagriculturalalgebraallarabicartart_musicbelarusbelarus_altbiologybusinesscatalachemistrychineseeconomicsegzamenglishentrepreneurshipenvironmentethicseuskarafirst_aidfrenchgalegogeographygeologygeometrygermangrammarhealthhistoryindia_langindonesian_langinformaticsitalianjapanesekazachkazach_altkoreanlanguagelatinlawlife_scienceliteraturelogicmathematicsmusicnigerian_langother_languagesotherspedagogicsphilosophyphysical_educationphysicspoliticspsychologyreligionrpa_langrussianrussian_altsciencesecurityskillssocial_sciencesociologyspanishstatisticstechnologytourismtrafficukrainianukrainian_altukrainian_literaturewos_civilisation accountancyadministrationagriculturalalgebraall_1arabicartart_music_2belarusbelarus_altbiologybusiness_2catalachemistry_1chineseeconomicsexam_3englishentrepreneurshipenvironment_2ethicseuskarasecurity_1frenchgalegogeography_4geology_4geometrygermangrammarhealthhistoryindia-langindonesian-langinformaticsitalianjapanesekazachAsset 230koreanlanguagelatinlawlife-scienceliteraturelogic_2mathematicsmusicnigerian-langotherlanguagesother_1pedagogicsphilosophyphysical_educationphysicspoliticspsychologyreligion_1rpa-langrussianrussian_altsciencesecurity_3_mskills_1allsocial_science_5_msociologyspanishstatisticstechnologytourismtrafficukrainianukrainian_altukrainian_literaturewos_civilisation
Автор - sasha12K

найдите корни уравнений
1) frac{2}{5}  -  frac{3}{5} x =  frac{2}{5}  -  frac{1}{10} x + 3
2) frac{5}{6} m + 2 =  frac{1}{3} m - 0.8
3) frac{3}{4} y - 12 = 5 -  frac{1}{4}  - 12
4) frac{7}{12} n - 3 =  frac{1}{2} n + 0.7
пожалуйста распишите подробно​

Ответ

Автор - sladkovyuri04

Пошаговое объяснение:

1)

frac{2}{5}  -  frac{3}{5} x =  frac{2}{5 }  -  frac{1}{10} x  + 3 \ </p><p>-  frac{3}{5} x =  -  frac{1}{10} x + 3

умножаем обе части равенства на 10:

- 6x =  - x + 30 \ </p><p> - 5x = 30 \ </p><p> x =  - 6 \

2)

frac{5}{6} m + 2 =  frac{1}{3} m - 0.8 \ </p><p>frac{5}{6} m -  frac{1}{3} m =  - 0.8 - 2 \ </p><p>frac{5m - 2m}{6}  =  - 2.8 \ </p><p>frac{3m}{6}  =  - 2.8 \ </p><p> frac{m}{2}  =  - 2.8 \

m =  - 5.6

3)

 frac{3}{4} y - 12 = 5 -  frac{1}{4}  - 12 \ </p><p> frac{3}{4} y = 5 -  frac{1}{4}  \ </p><p> frac{3}{4} y =  frac{20 - 1}{4}  \ </p><p> frac{3}{4} y =  frac{19}{4}  \ </p><p> y =  frac{19}{4}  div  frac{3}{4}  \ </p><p> y =  frac{19 times 4}{ 4times  3}  \

y =  frac{19}{3}

4)

frac{7}{12} n  - 3 =  frac{1}{2} n + 0.7 \ </p><p> frac{7}{12} n -  frac{1}{2} n = 3.7 \ </p><p>n( frac{7}{12}  -  frac{1}{2} ) = 3.7 \ </p><p>n frac{7 - 6}{12}  = 3.7 \ </p><p> frac{n}{12}  = 3.7 \

n = 12 times 3.7

n = 44.4

Ответы и объяснения

По всем вопросам пишите на - vashurokk@rambler.ru
Сайт znanija.net не имеет отношения к другим сайтам и не является официальным сайтом компании.