Question 1141541
If the solution of the system 

Ax + By	 = 	−16
Bx − Ay	 = 	−52
 is (−5,7),
 what are the values of the constants A and B?
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Ax + By	 = 	−16
Bx − Ay	 = 	−52
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-5x + 7y = -16
 7x + 5y = -52
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2 eqns in 2 variables.
Can you finish it?