решите уравнения 1)а)-3х+5х=2,4 б)(3х-1)-(2х-5)=0 в)2*(у+1)+5*(у-0,4)=14 2)а)-8...

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решите уравнения
1)а)-3х+5х=2,4
б)(3х-1)-(2х-5)=0
в)2*(у+1)+5*(у-0,4)=14
2)а)-8х+2х+3х=-12
б)(-7х+1)-(2-8х)=0
в)4*(у-1)-0,8*(у-5)=32
пж

Answers & Comments

Miа16

Ответ:

Задание 1

А) $-3x+5x=2,4$

$2x=2,4$

x = 1,2

Б) $(3x-1)-(2x-5)=0$

$3x-1-2x+5=0$

$x+4=0$

x = -4

В) $2(y+1)+5(y-0,4)=14$

$2y+2+5y-2=14$

$7y=14$

y = 2

Задание 2

А) $-8x+2x+3x=-12$

$-3x=-12$

x = 4

Б) $(-7x+1)-(2-8x)=0$

$-7x+1-2+8x=0$

$x-1=0$

x = 1

В) $4(y-1)-0,8(y-5)=32$

$4y-4-0,8y+4=32$

$3,2y=32$

y = 10

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