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3x+2y=17.....[1]
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document.write( "multiply eqn[2] by 2
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document.write( "3x+2y=17
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document.write( "2x-2y=-2
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document.write( "Add up both the equations:
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document.write( "3x+2y+(2x-2y)=17+(-2)
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document.write( "5x=17-2
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document.write( "5x=15
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document.write( "x=3
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document.write( "x-y=-1
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document.write( "-y=-1-x
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document.write( "-y=-(1+x)
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document.write( "y=1+x
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document.write( "y=1+3
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document.write( "y=4
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document.write( "x=3,y=4
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document.write( "-xC