Question

sistema de ecuaciones 2x-y=4 -6x+3y=18

Answer 1

$\bf \textcolor {blue}{2x - y = 4 \: (1)} \\\bf \textcolor {red}{ - 6x + 3y = 18 \: (2)}$

Despejamos Y en (1)

(-1)-Y=4-2×

Y=-4+2×

Sustituimos El valor de Y en (2)

-6×+3y=18

-6×+3(-4+2×)=18

-6×-12+6×=18

-6×+6×=18+12

0=30

=30/0

×=0

Sustituimos El valor de × en (1)

2×-y=4

2(0)-Y=4

(-1)-Y=4

Y=-4

Comprobación

2×-Y=4

2(0)-(-4)=4

4=4

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