Question

2x-Y-2z=2
2x-4y+2z=-4​

Answer 1

a) $2x-Y-2z=2$

$\mathrm{Restamos\:}-Y-2z\mathrm{\:de\:ambos\:lados}$

$2x-Y-2z-\left(-Y-2z\right)=2-\left(-Y-2z\right)$

$\mathrm{Simplificamos}$

$2x=2+Y+2z$

$\frac{2x}{2}=\frac{2}{2}+\frac{Y}{2}+\frac{2z}{2}$

$x=\frac{2+Y+2z}{2}$

b) $2x-4y+2z=-4$

$2x-4y+2z-\left(-4y+2z\right)=-4-\left(-4y+2z\right)$

$2x=-4+4y-2z$

$\frac{2x}{2}=-\frac{4}{2}+\frac{4y}{2}-\frac{2z}{2}$

$x=-2+2y-z$

$Buena\:suerte\:con\:tus\:tareas\::ProfeAndresFelipe :)$