Question

Resolva os Sistemas .
X+5y = 3
2x+3y = 13

Answer 1

Olá,

x+5y = 3 ⇒ ·(-2) ⇒ -2x-10y = -6
2x+3y = 13

-2x-10y = -6
2x+3y = 13
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-2x+2x-10y+3y = -6+13
-7y = 7
y = 7/-7
y = -1

x+5y = 3
x = 3-5y
x = 3-5(-1)
x = 3+5
x = 8

Resposta:

x = 8 e y = -1