A) 7x-5y+4z-9=0 -x+3y+5z-2=0 5x+y+14z-20=0 b) 7x-5y+4z-9=0 -5x+4y+z-3=0 x+2y-z+1=0 c) -3x+2y-z+10=0 6x-4y+2z-10=0 5x+7y+9z-14=0 d) 5x-9y+2z-3=0 4x+2y-3z+4=0 9x-7y-z+1=0 Aug 19 | Jas from New York, NY | 1 Answer | 0 Votes Mark favorite Subscribe Comment
do you want to use algebra (elimination) or matrices? Aug 19 | Phillip R. Comment Comments elimination please Aug 19 | Jas from New York, NY Comment
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