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
+37163 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
