SOLUTION: Hello, please i need help solving this problem step by step: -4x-8y-z=-64 x+2y+7z=43 -8x+y+z=-65 Thank you

Question 932411: Hello, please i need help solving this problem step by step:
-4x-8y-z=-64
x+2y+7z=43
-8x+y+z=-65
Thank you
Answer by MathLover1(20850) (Show Source): You can put this solution on YOUR website!

.....eq.1
.....eq.2
.....eq.3
___________________________
start with
.....eq.1
.....eq.3
_____________________________add both

....solve for

.........1a
go to .....eq.2, substitute and solve for

.........1b

.....eq.1

go to
.........1b

.........1a

.....eq.1

...round it to whole number

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