2x + 3y =12 चा आलेख काढण्यासाठी x =0 असताना y ची किंमत किती
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x+y=4 ___(1), 2x−5y=1__(2)
multiply eq. (1) by 2.
and then subtract eq. (2)
2x+2y=8
2x−5y=1
- + -
____________
7y=7
y=1
x+y=4
x+1=4
x=3
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