Question

Gente me ajudem por favor

Answer 1

Explicação passo-a-passo:

1 )

$\sf \left \{ {{ x+ y=10} \atop {x - y = 2}}$

=>Valor de X

$\sf 2x = 12$

$\sf x = \frac{12}{2}$

$\boxed{\boxed{\sf x = 6}}$

=>Valor de Y

$</strong><strong>\</strong><strong>s</strong><strong>f</strong><strong> </strong><strong>x</strong><strong> + y = 10$

$</strong><strong>\</strong><strong>s</strong><strong>f</strong><strong> </strong><strong>6 + y = 10$

$</strong><strong>\</strong><strong>s</strong><strong>f</strong><strong> </strong><strong>y</strong><strong> = 10 - 6$

$</strong><strong>\</strong><strong>b</strong><strong>o</strong><strong>x</strong><strong>e</strong><strong>d</strong><strong>{</strong><strong>\</strong><strong>b</strong><strong>o</strong><strong>x</strong><strong>e</strong><strong>d</strong><strong>{</strong><strong>\</strong><strong>s</strong><strong>f</strong><strong> </strong><strong>y</strong><strong> = 4</strong><strong>}</strong><strong>}</strong><strong>$

( x , y ) = ( 6 ; 4 )

2 )

$\sf \left \{ {{x + y=6} \atop {x + y = 4}}$

$\left \{ {{x + y = 6} \atop { - x - y = - 4}} \right$

$0 = 2$

( x , y ) e ∅

SPD pois ele é determinado

Espero ter ajudado !!!