Question

pelo metodo de adiçao b)3x+y=13 x-2y=2 c)2x+y=4 3x-y=1 d)2x+y=5 x-y=1

Answer 1

        Valor de (x)
$\left \{ {{3x+y=13(2)} \atop {x-2y=2}} \right.$
6x+2y=26
x-2y=2
2x=28
x=$\frac{28}{2}$
x=14
          Valor de (y)
14-2y=2
2y=2-14
2y=-12
y=$\frac{12}{2}$
y=-6
S{(14,-6)}