1) x - 5 = 80x = 80 + 5x = 85
2) 90 - x = 43-x = 43 - 90-x = -47x = 47
3) 6 + x = 92x = 92 - 6x = 86
Ответ: x = 85, x = 47, x = 86.
1) x - 5 = 80
x = 80 + 5
x = 85
2) 90 - x = 43
-x = 43 - 90
-x = -47
x = 47
3) 6 + x = 92
x = 92 - 6
x = 86
Ответ: x = 85, x = 47, x = 86.