Question

Ramon took a collection of color tiles from a box, amelia took 13 tiles from his collection and keiko took half of those remaining. ramon had 11 left. how many did he start with?

Answer 1

35 because 11 times 2 equals 22 and plus 13 equals 35

Answer 2

X-13=(x-13)/2+11
x/2=13/2+11
x=13+22
x=35
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