Question

Paul was thinking of a number.Paul doubles it and gets a answer of 13.1.What was the orginal number?

Answer 1

Answer:

See below:

Step-by-step explanation:

So first, Paul has a number that he got before he multiplied it, we can call that $p$, and for his answer after doubling it. we'll call it $n$.

So with this information, we know that $n=13.1$ so we can use that to make an equation.

$p*2=n\\p*2=13.1$

We can solve it by first dividing on both sides and getting our answer.

$p=\frac{13.1}{2} \\p=6.55$

Cheers! We get our final answer of 6.55.