Question

2x-Y-2z=2
2x-4y+2z=-4​

Answer 1

a) [tex]2x-Y-2z=2[/tex]

[tex]\mathrm{Restamos\:}-Y-2z\mathrm{\:de\:ambos\:lados}[/tex]

[tex]2x-Y-2z-\left(-Y-2z\right)=2-\left(-Y-2z\right)[/tex]

[tex]\mathrm{Simplificamos}[/tex]

[tex]2x=2+Y+2z[/tex]

[tex]\frac{2x}{2}=\frac{2}{2}+\frac{Y}{2}+\frac{2z}{2}[/tex]

[tex]x=\frac{2+Y+2z}{2}[/tex]

b) [tex]2x-4y+2z=-4[/tex]

[tex]2x-4y+2z-\left(-4y+2z\right)=-4-\left(-4y+2z\right)[/tex]

[tex]2x=-4+4y-2z[/tex]

[tex]\frac{2x}{2}=-\frac{4}{2}+\frac{4y}{2}-\frac{2z}{2}[/tex]

[tex]x=-2+2y-z[/tex]

[tex]Buena\:suerte\:con\:tus\:tareas\::ProfeAndresFelipe :)[/tex]