2x-2(4+x) dla x=2 POMÓŻCIE
2x-2(4+x) = 2*2 - 2(4 + 2) = 4 - 8 - 4 = -8
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2x-2(4+x) = 2*2 - 2(4 + 2) = 4 - 8 - 4 = -8