Question

2x+y=-10

×-3y=2

eliminar a "x"​

Answer 1

Explicación paso a paso:

$2x + y = - 10 \\ - 2(x - 3y = 2) = - 2x + 6y = - 4 \\ 7y = - 14 \\ y = \frac{ - 14}{7} \\ y = - 2 \\ 2x + ( - 2) = - 10 \\ 2x - 2 = - 10 \\ 2x = - 10 + 2 \\ 2x = - 8 \\ x = \frac{ - 8}{2} = - 4$