solve the following simultaneous equation x-y=0.9,11/2 (x+y)=1
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11/2 (x+y)=1
x+y=2/11
x+0.9=2/11 (y=0.9
x=2/11-0.9
=0.18-0.9
=-0.72
x+y=2/11
x+0.9=2/11 (y=0.9
x=2/11-0.9
=0.18-0.9
=-0.72
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