Question

utilizar el metodo de suma y resta

Answer 1

1). 6x-5y=-9....(3) +
4x+3y=13...(5)
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18x-15y=-27 +
20x+15y=65
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38x =38
x=1

hallando "y" en 4x+3y=13
4(1) +3y=13
3y=13-4
3y=9
y=3
...............................................
2) 7x-15y=1 +
-x- 6y=8.......(7)
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7x- 15y=1 +
-7x-42y=56
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-57y=57
y=-1

hallando "x" en 7x-15y=1
7x-15(-1)=1
7x+15=1
7x=1-15
7x=-14
x=-2