# SOLUTION: can someone help me? solve the system: { x+5y-z=4 {3x+4y+z=4 { x- y+z=0 I do not understand these questions. thanks for the help.

Algebra ->  Algebra  -> Matrices-and-determiminant -> SOLUTION: can someone help me? solve the system: { x+5y-z=4 {3x+4y+z=4 { x- y+z=0 I do not understand these questions. thanks for the help.      Log On

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 Algebra: Matrices, determinant, Cramer rule Solvers Lessons Answers archive Quiz In Depth

 Question 113455: can someone help me? solve the system: { x+5y-z=4 {3x+4y+z=4 { x- y+z=0 I do not understand these questions. thanks for the help.Answer by josmiceli(9648)   (Show Source): You can put this solution on YOUR website!There are 3 equations with 3 unknowns, so it should be possible to find x, y, and z. ---------------- add the 1st and 3rd subtract this equation from the 2nd one Now plug values for y and z into the 3rd equation The answers are x = 2 y = 0 z = -2 ---------- check answers ------------------- ------------------- ------------------ ------------------- OK