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    CarolD22's Avatar
    CarolD22 Posts: 1, Reputation: 1
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    #1

    Apr 13, 2010, 04:45 PM
    how to solve with elimination, x+y=90, y=4x+15
    Can anyone solve with elimination? Show work.
    x+y=90
    y=4x+15
    ballengerb1's Avatar
    ballengerb1 Posts: 27,378, Reputation: 2280
    Home Repair & Remodeling Expert
    		  
    #2

    Apr 13, 2010, 05:00 PM

    You take it in steps. Since you know what Y equals sub that into the first equation X+4X+15=90, that means 5X (take away 15 from both sides) = 75. Try the next step
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