Решить уравнения: 1. 38х-5х+18=200 2.2n+7n-12=69 3. 6y-y+19=43 3. 50y-18y=832 зарание !

1. 38х-5х+18=200
33х+18=200
33х=200-18
33х=182
х=182:33
х=5 17/33

2.2n+7n-12=69
9n-12=69
9n=69+12
9n=81
n=81/9
n=9

3. 6y-y+19=43
5y=43-19
5y=24
y=24/5
y=4.8

3. 50y-18y=832
32y=832
y=832/32
y=26