{2a+3b=2 4a-9b=-1

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{2a+3b=24a-9b=-1{2a+3b=24a-9b=-1{2a+3b=24a-9b=-1a=0.5b=1/3

{2a+3b=2 4a-9b=-1
{2a+3b=2 4a-9b=-1

{2a+3b=2 4a-9b=-1
a=0.5 b=1/3