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solve it by elimination 71x+ 37y= 253; 37x+71y=287 217n+131y=913 ;131n+217y=827 x+y=a+b ; ax -by -a^{{}^2}-^2

Answer» solve it by elimination 71x+ 37y= 253; 37x+71y=287 217n+131y=913 ;131n+217y=827 x+y=a+b ; ax -by -a^{{}^2}-^2


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