1) (653-x) + 122 = 86653 - x + 122 = 86775 - x = 86-x = -689x = 689
2) 544 - (344 - x) = 98544 - 344 + x = 98200 + x = 98x = 98 - 200x = -102
Ответ: x = 689; x = -102.
1) (653-x) + 122 = 86
653 - x + 122 = 86
775 - x = 86
-x = -689
x = 689
2) 544 - (344 - x) = 98
544 - 344 + x = 98
200 + x = 98
x = 98 - 200
x = -102
Ответ: x = 689; x = -102.