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Y= 9x -9 y= 9 substitution method
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Y= 9x -9 y= 9 substitution method

User Dariush Malek
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You would plug in the y=9 into the first equation and then have the expression 9=9x-9
. After going through the first steps of solving an expression you would get 18=9x. X=2. Then you would plug in the x value into the first expression to get y=9.
User Siegel
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