Löse das lineare Gleichungssystem.


`{(-10x,+,15y,-,6z,-,30w,=,126),(-2x,+,5y,-,3z,-,6w,=,26),(-2x,+,3y,-,3z,-,6w,=,18),(20x,-,30y,+,12z,+,59w,=,-250):}`

x =  
y =  
z =  
w =