Solve the system by back substitution.
4x+8y+2z+6w,=4
-5y-30z-10w,=-40
-5z-5w,=-10
-4w,=-12
The solution is
(Type integers or simplified fractions
Solve the system by back substitution
4x+8y+2z+6w= 4 -5y-30z-10w=-40 -5z-5w=-10 -4w=-12
The solution is
.(Type integers or
simplified fractions