10n-9=7n+12 14= 2y-2 -10z+75+=-5z 17-12n=3n-13 8y-15=7y-12 11m-13=15-3m 30-15z=40-14z решите уравнения

Пошаговое объяснение:

10n-9=7n+12

10n - 7n = 12 + 9

3n = 21

n = 21 : 3

n = 7

14= 2y-2

2y = 14 + 2

2y = 16

y = 16 : 2

y = 8

-10z+75+=-5z

17-12n=3n-13

3n + 12n = 17 + 13

15n = 30

n = 30 : 15

n = 2

8y-15=7y-12

8y - 7y = 15 - 12

y = 3

11m-13=15-3m

11m + 3m = 15 + 13

14m= 28

m = 28 :14

m = 2

30-15z=40-14z

-15z + 14z = 40 - 30

-z = 10

z = -10