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caliju
@caliju
October 2020
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Sistema de equação
{2x+3y = 19
{x-y = -3
por favor respondão rapido
2
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Usuário do Brainly
Usuário do Brainly
{2x + 3y = 19
{x - y = - 3
x - y = - 3
x = - 3 + y
2x + 3y = 19
2 . (- 3 + y) + 3y = 19
- 6 + 2y + 3y = 19
2y + 3y = 19 + 6
5y = 25
y = 25/5
y = 5
x = - 3 + y
x = - 3 + 5
x = 2
S = {2, 5}
Heberwagner
Heberwagner
(a) 2x+3y = 19 ===>>> 2x + 3y = 19
(b) x-y = -3 (3) ===>>> 3x - 3y = -9
5x = 10 ==>> x = 10/5 =>
x = 2
- Substituindo x = 2, em quaisquer das equações:
x - y = -3 => 2 - y = -3 => -y = -3 - 2 => -y = -5 (-1) =>
y = 5
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