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15 _ { 10 } + X _ { 2 } = 11011 _ { 2 }​

1 Answer

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11011₂ = 2⁴ + 2³ + 2¹ + 2⁰ = 27

15 + x₂ = 27

x₂ = 12 = 8 + 4 = 2³ + 2² = 1100

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