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Question

Mark the correct alternative in the following question:

If x-23=2x-13-1, then x=a 2 b 4 c 6 d 8

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Solution

As, x-23=2x-13-1x-23-2x-13=-1 By transposing 2x-13 to LHSx-2-2x-13=-1x-2-2x+13=-1-x-13=-1-x-1=-1×3 By transposing 3 to RHS-x-1=-3-x=-3+1 By transposing -1 to RHS-x=-2 x=2

Hence, the correct alternative is option (a).

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