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I give 1/8 of my stamps to Tom. If I gave Tom 15 stamps, how many stamps did I have at first?



Answer :

brookegallagher
1/8 of x = 15
1/8x=15
0.125x=15
0.125x/0.125=15/0.125
x = 120
You had 120 stamps to begin with.
TSO
1/8 of all of your stamps = 15

Lets call 'all of your stamps' as s

And also remember that 'of' means multiplications so:

1/8 x s = 15

Multiply 8 on both sides:

s = 15 x 8

s = 120

So you have 120 stamps originally.

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