Resposta :

6x-3y=20 (-1)
4x-3y=40

6x+3y=20
4x-3y=40
10x=60
x=6
Eriivan
[tex] \left \{ {{6x-\not3y=20} \atop {4x+\not3y=40}} \right. [/tex]

[tex]10x=60[/tex]

[tex]x= \frac{60}{10} [/tex]

[tex]\boxed{x=6}[/tex]

[tex]4x+3y=40\\3y=40-4x\\3y=40-4.6\\3y=16[/tex]

[tex] \boxed{y=\frac{16}{3}} [/tex]


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