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21 August, 22:56

If 2x + 5y = 10 and x = 3y + 1, what is 11x + 11y?

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  1. 21 August, 23:10
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    You have to solve the two equations by eliminating x or y

    2x+5y=10

    x-3y=1

    Multiply all terms of second equation by two and subtract from first equation, thus eliminating x

    2x+5y-2x+6y=10-2

    11y=8

    y=8/11

    x=3y+1=3 * 8/11+1=25/11

    11x+11y = 11*25/11 + 11*8/11

    = 25+8=33
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