Question

{3x-y=7
{4x-5y=2
Me ajudem por favor $\left \{ {{y=2} \atop {x=2}} \right.$

Answer 1

3x-y=7 (.-5)
4x-5y=2

-15x+5y=-35
4x -5y=2

-11x = -33(.-1)
11x=33
x= 33/11
x= 3

3x-y=7
3.3-y=7
9-y=7
-y=7-9
-y= -2 (.-1)
y= 2

(3,2)