Решите уравнения 9 класса . Срочно а) 2x³-1=15
b) 1/2 x³ - 1 = 31
c) ( x -1)³ + 1=9

( x-2)³ - 1 =7
(x-2)³=8
x-2=∛8
x-2=2
x=4 - образец
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