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Lay57
@Lay57
December 2019
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Resolva os sistemas
2x+y= -9
x+y= -4
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X+y= -4 --> x= -4-y
2x+y= -9 --> 2(-4-y)+y= -9
-8-2y+y= -9
-y= -9+8
y= 1
x=-4-1
x=-5
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2x+y= -9 --> 2(-4-y)+y= -9
-8-2y+y= -9
-y= -9+8
y= 1
x=-4-1
x=-5