x + 100 = 500 + 500

x + 100 = 1000

          x = 1000 - 100

          x = 900

ai k mk mk k l

ại ^_^

x + 100 = 500 + 500

x + 100 = 1000

x          = 1000 - 100

x          =        900

a)1700

b)2000

a, 500+500+500+(100 x 2)

=500 x 3+ 100x2

=1500+200

=1700

b, 700+300+(100 x 10)=700+300+1000=1000+1000=2000

k minh nha

x + 100 = 500 + 500

x + 100 = 1000

x = 1000 - 100

x = 900

Tk mk nha 

x + 100 = 500 + 500

x  + 100 = 1000

x           = 1000 - 100

x            = 900

Vậy x = 900

k nha

x + 500 = 500 + 100

x + 500 = 600

          x = 600 - 500

          x = 100

ai tk mk mk tk lại

x = 100

tk mình đi

mk tk bn rồi đó

thank you

x+500=100

x=100-500

x=-400

x + 500  =100 - 500 + 500

x + 500 = -400 + 500

x + 500 = 100

x = 100 - 500

x = -400.

500 + 500 = 1 000

100 + 100 = 200

200 + 200 = 400

2 000 x 20 = 40 000

500 + 500 = 1000

100 + 100 = 200

200 + 200 = 400

2000 x 20 = 40000

a) x . x . x = 125

x³ =125

x³ = 5³

= > x = 5

b) ( x + 500 ) = 1000 - 200 . 2

x + 500 = 1000 - 400

x + 500 = 600

x = 600 - 500

x = 100

x +100 = 500 : 2

x+ 100 = 250

x=250-100

x= 150

x+500= 650

x= 650-500 

x= 150 

k giúp mik nhé

x + 100 = 500 : 2

x + 100 = 250

x = 250 - 100

x = 150

x + 500 = 600

x = 600 - 500

x = 100

K mk mk k lại

Hứa luôn 

a) 2 100 : 10 = 210

    4 500 : 100 = 45

    83 000 : 1 000 = 83

b) 720 : 10 : 8 = 72 : 8 = 9

    1 500 : (5 x 100) = 1 500 : 5 : 100 = 300 : 100 = 3

    60 000 : 1 000 x 6 = 60 x 6 = 360