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Exponents And Powers Test - 4

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  • Question 1
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    If 2(x - y) = 64 and 2(x + y) = 256, find the value of x.

    Solution

    We have 2(x - y) = 64 or 2(x - y) = 26

    So, x - y = 6 ... (i)
    Also, 2(x + y) = 256 or 2(x + y) = 28

    So, x + y = 8 ... (ii)

    Adding equations (i) and (ii),

    x + x = 14
    Or x = 7

     

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