Question

x-100=200+900

x+100=300-400

Answer 1

x - 100 = 200 + 900

x - 100 = 1100

x         = 1100 + 100

x         = 1200

x + 100 = 300 - 400

x + 100 = - 100

x          = - 100 - 100

x          = - 200

Answer 2

x+100=200+900

x+100=1000

x=1000-100

x=900

x+100=300-400

x+100=-100

x=-100-100

x=-200

Answer 3

X-100=200+900

X-100=1100

X       =1100+100

X       =1200

Answer 4

x-100=1100

      x=1100-100

      x=1000

x+100= -100

      x = -100-100

       x= -200