SOLUTION: What multiplier should be used for each of the following equations to eliminate one unknown by subtraction?
3x-y = 7 2x+7y = 42
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Question 126300: What multiplier should be used for each of the following equations to eliminate one unknown by subtraction?
3x-y = 7 2x+7y = 42
Answer by checkley71(8403) (Show Source): You can put this solution on YOUR website!
7(3x-y=7) will eliminate the y variable when added to the other equation-thus:
21x-7y=49
2x+7y=42
--------------------
23x=91
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