-5.4 - (x - 7.2) = 1.9
-5.4 - x + 7.2 = 1.91.8 - x = 1.9
-x = 1.9 - 1.8-x = 0.1
x = -0.1
Ответ: x = -0.1
-5.4 - (x - 7.2) = 1.9
-5.4 - x + 7.2 = 1.9
1.8 - x = 1.9
-x = 1.9 - 1.8
-x = 0.1
x = -0.1
Ответ: x = -0.1