SOLUTION: solve the system by back substitution 4x+8y+2z+6w=-4 -3y-18z-6w=-24 -5z-5w=-10 5w=15 i solved from the bottom and got w=3 and kept plugging into each equation and i ended

Algebra ->  Expressions -> SOLUTION: solve the system by back substitution 4x+8y+2z+6w=-4 -3y-18z-6w=-24 -5z-5w=-10 5w=15 i solved from the bottom and got w=3 and kept plugging into each equation and i ended       Log On


   

Question 1138225: solve the system by back substitution
4x+8y+2z+6w=-4
-3y-18z-6w=-24
-5z-5w=-10
5w=15
i solved from the bottom and got w=3 and kept plugging into each equation and i ended up with w=3,z=-1,y=14/3 and x=-43/3
but it says my answers are wrong help please.
Answer by josgarithmetic(39620) About Me  (Show Source):