Question

Resolva o sistema
{4x+2y=2
{2x-y=0
Me ajude prfvr

Answer 1

 {4x+2y=2
{2x-y=0 ==> y = 2x  

 4x + 2(2x) = 2
 4x + 4x = 2
      8x = 2
      x =  2
            8
 
       y = 2x ==> y = 2.2 ==> y = 4 ==> y = 1
                                 8              8              2

Answer 2

$\left \{ {{4x+2y=2~*(2)} \atop {2x-y=0~*(-4)}} \right.$

$\left \{ {{8x+4y=4} \atop {-8x+4y=0}} \right. \\ \\8y=4\\ y=\frac{1}{2}$

$\boxed{y= \frac{1}{2} }$
$2x-y=0\\2x=y\\x=\frac{y}{2}$

$x=\frac{ \frac{1}{2} }{2}~\to~ \frac{1}{2} . \frac{1}{2} ~\to~ \frac{1}{4}$

$\boxed{x= \frac{1}{4} }$