# Fraction problem

Level
pending

If \[\frac{1}{x} + \frac{1}{y}\] equals to \[\frac{4}{7}\] so \[x^{2}-y^{2}\] equals to

Level
pending

If \[\frac{1}{x} + \frac{1}{y}\] equals to \[\frac{4}{7}\] so \[x^{2}-y^{2}\] equals to

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