Решите уравнени.
14-2у=2
11-6z=2-7z
10n-9=7n+12
-7x-40=3x
12m+9=11m+7

14-2y=2
-2y=2-14
2y=14-2=12
y=12/2=6

11-6z=2-7z
7z-6z=2-11
z=-9

10n-9=7n+12
10n-7n=12+9
3n=21
n=21/3=7
n=7

-7x-40=3x
-10x=40
x=40/(-10)=-4
x=-4

12m+9=11m+7
12m-11m=7-9
m=-2