Solve the rational equation:
−
9
a
a
2
−
49
+
5
a
+
7
=
1
a
−
7
\displaystyle \frac{{-{9}{a}}}{{{a}^{{2}}-{49}}}+\frac{{5}}{{{a}+{7}}}=\frac{{1}}{{{a}-{7}}}
a
2
−
49
−
9
a
+
a
+
7
5
=
a
−
7
1
Answer:
a
=
\displaystyle {a}=
a
=
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