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Izabelaferry
@Izabelaferry
December 2019
1
24
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{ x = y - 5
{ x + 3y = 19
Por favor deixem o cálculo ♡
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anvigo33
Se x = y-5 vc substitui na outra equaçao o valor do x.
x+3y=19
y-5+3y=19
2y= 19+5
2y=24
y= 24:2
y=12 e x= 12-5
x= 7
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x+3y=19
y-5+3y=19
2y= 19+5
2y=24
y= 24:2
y=12 e x= 12-5
x= 7