480+45*4=(x+125):5+260 2005*(x-2006)=2005 [(x+50)*50-50]:50=50 *này là dấu nhân nha

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1. a)480+45*4=(x+125):5+260

   (x+125):5+260=660

   (X+125):5=660-260

   (x+125):5=400

   x+125=400*5

   x+125=2000

   x=2000-125

   x=1875

   b)2005*(x-2006)=2005

   (x-2006)=2005:2005

   (x-2006)=1

   x=1+2006

   x=2007

   c)[(x+50)x50-50]:50=50

   [(x+50)x50-50]=50*50

   (x+50)x50-50=2500

   (x+50)x50=2500+50

   (x+50)x50=2550

   x+50=2550:50

   x+50=51

   x=51-50

   x=1

   nhớ vote cho mik câu trả lời hay nhất nha

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2. a)480+45*4=(x+125):5+260

   (x+125):5+260=660

   (X+125):5=660-260

   (x+125):5=400

   x+125=400*5

   x+125=2000

   x=2000-125

   x=1875

   b)2005*(x-2006)=2005

   (x-2006)=2005:2005

   (x-2006)=1

   x=2007

   c)[(x+50)x50-50]:50=50

   [(x+50)x50-50]=50*50

   (x+50)x50-50=2500

   (x+50)x50=2500+50

   (x+50)x50=2550

   x+50=2550:50

   x+50=51

   x=51-50

   x=1

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