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 - Nikanurgazi

1)Решите систему уравнений:{3(y-2x)-(5y+2)=5(1-x) а внизу {7-6(x+y)=2(3-2x)+y.
2)Решите уравнение: 3|x|-2=2 |x|+3.

Ответ

Автор - пимочка
№1.
{3(y-2x)-(5y+2)=5(1-x)   {3у-6х-5у-2=5-5х  {-6х+5х+3у-5у=5+2   {-х-2у=7     | (-2)
{7-6(x+y)=2(3-2x)+y.      {7-6х-6у=6-4х+у   {-6х+4х-6у-у=6-7       {-2х-7у=-1 |

{2х+4у=-14
{-2х-7у=-1
_________
      -3у=-15
        у=5
-х-2*5=7
-х-10=7
-х=7+10
-х=17
х=-17
Ответ: (-17;5)
№2.
3|x|-2=2 |x|+3
1) 3х-2=2х+3
3х-2х=3+2
х=5
2) -3х-2=2х+3
-3х-2х=3+2
-5х=5
х=-1
3) 3х-2=-2х+3
3х+2х=3+2
5х=5
х=1
4) -3х-2=-2х+3
-3х+2х=3+2
-х=5
х=-5
Ответ: х1=5, х2=-5, х3=-1, х4=1

Ответы и объяснения

По всем вопросам пишите на - vashurokk@rambler.ru
© 2024 Все права защищены