Solve 31x+23y=39 23x+31y=15
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31x+23y=39..............................1)
23x+31y=15..............................2)
1)*23 & 2)*31 →
713x+529y=897
713x+961y=465
- - -
-------------------------
-432y =432
∴y= -1
23x+31y=15
∴23x+31*(-1)=15
or,23x=15+31=46
∴x=2
∴x=2,y=-1.
23x+31y=15..............................2)
1)*23 & 2)*31 →
713x+529y=897
713x+961y=465
- - -
-------------------------
-432y =432
∴y= -1
23x+31y=15
∴23x+31*(-1)=15
or,23x=15+31=46
∴x=2
∴x=2,y=-1.
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