Question

a (x-2005). 2006=0

b 2005.(x-2006)=2005

c 480+45.4=(x+125):5+260

d [(x+50).50-50]:50=50

Answer 1

a) (x - 2005 ) . 2006 = 0

x - 2005 = 0 : 2006

x - 2005 = 0

x = 0 + 2005

x = 2005

b) 2005.(x-2006) = 2005

x - 2006 = 2005 : 2005

x - 2006 = 1

x = 1 + 2006

x = 2007

c) 480+45.4=(x+125) : 5 + 260

480 + 180 = (x+125) : 5 + 260

660 = ( x + 125 ) : 5 + 260

660 - 260 = ( x+ 125 ) : 5

400 = ( x + 125 ) : 5

400 x 5 = x + 125

2000 = x + 125

2000 - 125 = x

1875 = x

tương tự

Answer 2

231321131

1231231

4564646+

3123165

1564156