Question

x - 100 = 900

x + 200 = 500

Answer 1

x - 100 = 900

x = 900 + 100

x = 1 000.

x + 200 = 500 

x = 500 - 200

x = 300.

Answer 2

x - 100 = 900

      x = 900 + 100

      x = 1000

x + 200 = 500

      x = 500 - 200

      x= 300

k

Answer 3

a, x-100=900                  b, x+200=500

=>x=900+100                 =>x=500-200

=>x=1000                       =>x=300

Vậy x=1000                       Vậy x=300

Answer 4

X - 100 = 900

X = 900 + 100

X = 1000

X + 200 = 500

X = 500 - 200

X = 300

Answer 5

x-100=900

x=1000

x+200=500

x=300

Answer 6

x - 100 = 900

x         = 900 + 100

x         =1000

x + 200 = 500

x          = 500 - 200

x          =    300

Answer 7

1000-100=900

300+200=500