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Jacks bank statement shows an account balance of -$25.50. which describes the magnitude, of size, of the debt in dollars

In the figure below, ∠dec ≅ ∠dce, ∠b ≅ ∠f, and segment df is congruent to segment bd. point c is the point of intersection between segment ag and segment bd, while point e is the point of intersection between segment ag and segment df. the figure shows a polygon comprised of three triangles, abc, dec, and gfe. prove δabc ≅ δgfe.

For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?