Question: Solve the system by back substitution. 2x + 4y +z +3w= 4 -3y - 18z-6w= -24 2z+ 2w= 4 - 3w = -9 The solution

Solve the system by back substitution. 2x + 4y +z +3w= 4 -3y - 18z-6w= -24 2z+ 2w= 4 - 3w = -9 The solution set is .OOD). (Type an integer or a simplified fraction.)

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