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Dola1
@Dola1
December 2019
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Sistema de equacoes simultaneas do 1° grau 2x+3y=47 e x+y=20
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Dex01
2X + 3Y = 47
X + Y = 20;
===========================================================;
Y = 20 - X;
=========================================================;
2X + 3(20-X) = 47;
2X + 60 - 3X = 47
-X = -13 (-1);
X = 13 ;
2(13) + 3Y = 47
3Y = 47 - 26
3Y = 21;
Y = 21/3
Y = 7;
1 votes
Thanks 3
Comentários
2x+3y=47
x+y=20
2x+3y=47
x+y=20 .(-3)
2x+3y=47
-3x-3y=-60
-x=-13
x=13
13+y=20
y=7
0 votes
Thanks 1
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Lista de comentários
X + Y = 20;
===========================================================;
Y = 20 - X;
=========================================================;
2X + 3(20-X) = 47;
2X + 60 - 3X = 47
-X = -13 (-1);
X = 13 ;
2(13) + 3Y = 47
3Y = 47 - 26
3Y = 21;
Y = 21/3
Y = 7;
x+y=20
2x+3y=47
x+y=20 .(-3)
2x+3y=47
-3x-3y=-60
-x=-13
x=13
13+y=20
y=7