<PRE><B>Question 1125319</B>
 2x + 6y= 0
-2x - 5y= 0
------------------ Add


 2. -2x - 3y= 25
-2x + 6y= 58 
------------------------- Subtract

 3. 8x + 13y= 179
2x - 13y- -69 
------------------------- Add

 4. 2x + 7y= -7
5x + 7y= 14 
---------------------------- Subtract

 5. 6x + 3y= 0
-3x + 3y= 9 
------------------- Subtract

 6. 3x - 8y= 32
-x + 8y= -16 
---------------------- Add

 7. 5x + 7y= -1
4x - 2y= 22 
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20x + 28y = -4 --------- 1st eqn times 4
20x - 10y = 110 -------- 2nd eqn times 5
------------------------ Subtract
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