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jhonatanyacuza
@jhonatanyacuza
April 2022
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Joca criava 75 animais em sua fazenda entre cavalos e marrecos . sabe - se que ao todo existiam 210 pernas . quantos cavalos e quantos marrecos Joca criava na fazenda ?
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anaaluisaa
X=cavalos
y=marrecos
x+y=75
4x+2y=210
x=75-y
4(75-y)+2y=210
300-4y+2y=210
-2y=-90 ( -1)
2y=90
y=90/2
y=45 marrecos
x+y=75
x+45=75
x=75-45
x=30 cavalos
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y=marrecos
x+y=75
4x+2y=210
x=75-y
4(75-y)+2y=210
300-4y+2y=210
-2y=-90 ( -1)
2y=90
y=90/2
y=45 marrecos
x+y=75
x+45=75
x=75-45
x=30 cavalos