3 years ago

I think of a number multiply it by 2, subtract 5 and multiply the result by 2

1 answer:

7 0

Call our original number n. Then here's what we did in an equation:
$(n*2-5)*2=2$

We can solve this for n:
$n*2-5=1$
$n*2=6$
$n=3$

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