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2=200 + x
3=x
300+200 +3x = 2000
500+3x = 2000
3x = 2000-500
3x = 1500
x= 1500/3
x = 500
por lo tanto :
1=300 + x = 300 + 500= 800
2=200 + x = 200 + 500 = 700
3=x = 500