x + 500 = 1000

x          = 1000 - 500

x          = 500

Vay x =500

ai k mik k lai

x+360=400

x=400-360

x=40

vậy......k mình nha...kb nữa...^_^...thanks♥

x + 360 = 400

x          = 400 - 360

x          = 40

Vay x =40

ai k mik mik k lai

x = 300

k mk nha~~

x+200=500

x=500-200

x=300

\(x+20=50+30\)

\(x+20=80\)

\(x=80-20\)

\(x=60\)

x + 20 = 50 + 30

x + 20 = 80

x         = 80 - 20

x         = 60

x + 60 = 100 + 100

x + 60 = 200

       x = 200 - 60

       x = 140

k cho mik nha

x + 60 = 100 + 100

x + 60 = 200

x        = 200 - 60

x        = 140

x + 200 = 500 - 200

x + 200 = 300

         x = 300 - 200 

         x = 100

k mik mik k lại. 

x + 200 = 500 - 200

x + 200 = 300

x          =  300 - 200

x          =      100

ai tk mk mk tk lại nha ^_^

x + 200 = 500 + 200

x + 200 = 700

x          = 700 - 200

x          = 500

x + 200 = 500 + 200

x + 200 = 700

          x = 700 - 200

          x = 500

k mik mik k lai ^_^

x + 100 = 500 + 200

x + 100 = 700

x          = 700 - 100

x          = 600

x=600 bạn nhé

x + 900 = 100 +1500

x + 900 = 1600

          x = 1600 - 900

         x = 700

ai nhanh mik k va k lai mik nha

mik nhanh nh

ất k mik ^_^

x + 900 = 100 + 1500

x + 900 = 1600

x = 1600 - 900

x  =      700

x + 600 = 300 + 700

x + 600 = 1000

x          = 1000 - 600 

x          =   400

x + 600 = 300 + 700

x + 600 = 1000

x          = 1000 - 600

x          = 400