Question

-7x-40=3x; 10n-9=7n+12; 14=2x-2; -10z+75=-5z
Решение и ответ​

Answer 1

Ответ:

Пошаговое объяснение:

-7x-40=3x

-7х-3х=40

-10х=40

х=40:(-10

х=-4

10n-9=7n+12

10n-7n=12+9

3n=21

n=21:3

n=7

14=2x-2

-2х=-2-14

-2х=-16

х=-16:(-2)

х=8

-10z+75=-5z

-10z+5z=-75

-5z=-75

z=-75:(-5)

z=15

Answer 2

$- 7x - 40 = 3x \ - 7x - 3x = 40 \ - 10x = 40 \ x = 40 div ( - 10) \ x = - 4 \ \ 10n - 9 = 7n + 12 \ 10n - 7n = 12 + 9 \ 3n = 21 \ n = 21 div 3 \ n = 7 \ \ 14 = 2x - 2 \ - 2x = - 2 - 14 \ - 2x = - 16 \ x = - 16 div ( - 2) \ x = 8 \ \ - 10z + 75 = - 5z \ - 10z + 5z = - 75 \ - 5z = - 75 \ z = - 75 div ( - 5) \ z = 15$