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

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

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