Предмет: Математика, автор: TamiDobro

помогите пожалуйста очень срочно я не понимаю как такое решить!

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Ответы

Автор ответа: TigerYa
0


{ 7•(х-6)} /4 ={ 5•(х+1)}/3 -3•(х+2)

{7•х-7•6}/4= {5•х+5•1}/3 -3•х-3•2

{7х-42}/4= {5х+5}/3- 3х-6

{7х-42}/4 = {5х+5}/3- (3х•3)/3- (6•3)/3

{7х-42}/4= {5х+5}/3- 9х/3- 18/3

{7х-42}/4= {5х+5-9х-18}/3

{7х-42}/4= {-4х-13}/3

{7х-42}• 3= {-4х-13}•4
7х•3-42•3=-4х•4-13•4
21х-126=-16х-52
21х+16х=126-52
37х=74
Х=74/37
Х=2 ответ

Проверка
{ 7•(х-6)} /4 ={ 5•(х+1)}/3 -3•(х+2)
{7•(2-6)}/4= {5•(2+1)}/3- 3•(2+2)
{7•(-4)}/4= {5•3}/3- 3•4
{-28}/4= 15/3- 12
-7= 5-12
-7=-7
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