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(3³)³*4x-3¹¹≤3¹⁰x+4*3⁹ /:3⁹
4x-3²≤3x+4
4x-3x≤4+9
x≤13
b)
(5²)⁴x-3*5⁷ ≥ (5³)²x+5⁶ /:5⁶
25x-3*5≥x+1
25x-x≥1+15
24x≥16
x≥16/24
x≥2/3