# SOLUTION: How do I use linear combinations to solve this linear system: y=x-9 x+8y=0 So far I've gotten this far:

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 Click here to see ALL problems on Linear Algebra Question 566516: How do I use linear combinations to solve this linear system: y=x-9 x+8y=0 So far I've gotten this far: (y-x=-9) 9y=-9 (Divided 9 to each side) 8y+x=o y=-1 I need the other half of the problem where y is eliminated and x is solved so I have two points. Example: (8,-1) This is the solution I just don't know how to get 8. Please help me out, thank you.Answer by mananth(12270)   (Show Source): You can put this solution on YOUR website!-1 x + 1 y = -9 .............1 1 x + 8 y = 0 .............2 Eliminate y multiply (1)by -8 Multiply (2) by 1 8 x -8 y = 72 1 x 8 y = 0 Add the two equations 9 x = 72 / 9 x = 8 plug value of x in (1) -1 x + 1 y = -9 -8 + 1 y = -9 1 y = -9 +8 1 y = -1 y = -1