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Expansion of (x^2 - y^2)

Find the valu...

Question

Find the value of the unknown variable from the given equation
$7 x = 56^{2} - 49^{2}$

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Solution

$7 x = 56^{2} - 49^{2}$
or, $7 x = (56 + 49) (56 - 49)$
or, $7 x = 7 \times 105$
Comparing both sides, $x = 105$ Ans

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