Mathematics

lakshithbandaralakshithbandara Confirm Email
edited June 2015 in Ordinary Level

ane mata me "samagami sameekaranaya" wisandala dennako?

2x+3y= -7

2x+12y=2

please.

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  • MessaMessa Student
    edited June 2015

    2x+3y= -7 —①
    2x+12y=2 —②

    ② - ①

    2x+12y-(2x+3y) = 2-(-7)
    2x+12y-2x-3y = 2+7
    9y=9
    y=1

    y=1 ①ට ආදේශ කරමු.

    2x+3y=-7
    2x=-7-3
    2x=-10
    x=-5

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