x+100=200-500 x+800=1000
x+100=-300 x =1000-800
x =(-300)-100 x =200
x =(-300)+(-100)
x =-400
x+100=200-500
x+100=-300
x=-300+100
x=-200
x+800=1000
x=1000-800
x=200
x+100=200-500
x+100=-300
x=-300-100
x=-400
x+100=200-500
x+100=-300
x=-300-100
x=-400
x+800=1000
x=1000-800
x=200
x + 100 = 200 - 500
x + 100 = - 300
x = - 300 - 100
x = - 400
x - 100 = 200 - 300
x + 800 = 1000
x = 1000 - 800
x = 200
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