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Joe was going to Sell all of his Stamp Collection to buy a Video game After Selling half of them he changed his mind He then bought eleven more How many did he start with if he now has 30 

Guest Mar 21, 2017
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x = original amount

 

1/2x  + 11 = 30   SUbtract 11 from both sides of the = sign

1/2x = 19            Multiply both sides by 2

x = 38

ElectricPavlov  Mar 21, 2017

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