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Oogas
@Oogas
December 2019
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Resolva o sistema linear do 1º grau pelo método da adição
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glamber
(3x+y=9)*(-3)= -9x-3y=-27
2x+3y=13 2x+3y=13
-9x-3y+2x+3y=-27+13
-7x=-14
x=2
(3x+y=9)*(-2/3)= -2x-2/3y=-6
2x+3y=13 2x+3y=13
-2x-2/3y+2x+3y=-6+13
7/3y=7
7y=21
y=3
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Lista de comentários
2x+3y=13 2x+3y=13
-9x-3y+2x+3y=-27+13
-7x=-14
x=2
(3x+y=9)*(-2/3)= -2x-2/3y=-6
2x+3y=13 2x+3y=13
-2x-2/3y+2x+3y=-6+13
7/3y=7
7y=21
y=3