1) 75 + x = 90x = 90 - 75x = 15
2) 80 - k = 42-k = 42 - 80-k = -38k = 38
3) 6n = 54n = 54 / 6n = 9
Ответ: x = 15, k = 38, n = 9
1) 75 + x = 90
x = 90 - 75
x = 15
2) 80 - k = 42
-k = 42 - 80
-k = -38
k = 38
3) 6n = 54
n = 54 / 6
n = 9
Ответ: x = 15, k = 38, n = 9