Ответы на вопрос:
a) 2/3x = 5/6 │*6
4x = 5
x = 1.25
b) -2x = 1 1/3
-2x = 4/3
x = - 2/3
c) -0.001x = 1
x = -1000
d) 0.3x-20 = 0
0.3x = 20
x = 66 2/3
e) -0.17x-51 = 0
-0.17x = 51
x = -300
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