Subtracting 30 percent of which number gives 2000? Subtracting $30$ percent of which number leads to $2000$?
$$x - (30 \text{ percent of }x) = 2000$$
for example:
$$4000 - (50\text{ percent of }4000) = 2000$$
 A: You want to find a number $x$ such that $x-30\%x=2000$ or equivalently $$x-\frac{30}{100}x=2000$$ which can be written as $$\frac{100}{100}x-\frac{30}{100}x=2000$$ and $$\frac{70}{100}x=2000$$ This gives $$\frac{70}{100}\times \frac{100}{70}x=2000\times \frac{100}{70}$$ which gives $$x=200\times100/7=2857\frac{1}{7}$$
A: solve $x - 0.3 x = 2000$ for x :P
A: Remember that $30\%$ of a number is equal to $0.3$ of that number. So from your equation, we have $$x - 0.30 x = 2000 \iff x(1-0.30) = 0.7x = 2000 $$ $$\iff x = \dfrac{2000}{0.7} = \dfrac{20000}{7} \approx 2857.14$$
A: Hint
$$x-30\%\times x=2000\equiv x-\frac{30}{100}\times x=2000\implies x\left(1-\frac3{10}\right)=2000,x=?$$
A: What does a percent means?
It means you take a proportion of a number x.
Expressed in percent, it is like if you had cut x into a hundred parts and you keep say thirty parts. That's 30%.
Cutting x into 100 parts is x divided by 100, right ?
So keeping 30 parts of is $30 \times \frac{x}{100}$.
Your equation becomes :
$$x - \frac{30 \times x}{100} = 2000$$
This might be something you're used to!
A: You can kind of do this without using an explicit unknown, $x$, although after a while you may well prefer using $x$. 
O.K. Beginning with $100\%$, if you take away $30\%$ you end up with $70\%$ so that $2000$ is equivalent to $70\%$. 
It is incorrect to write $2000=70\%$ so instead write
$$\begin{align}
70\%&\equiv 2000
\\ \Rightarrow 70\frac{1}{100}&\equiv 2000
\\ \Rightarrow \frac{70}{100}&\equiv 2000
\\ \Rightarrow \frac{7}{10}&\equiv 2000
\\ \Rightarrow \frac{1}{10}&\equiv \frac{2000}{7}
\\ \Rightarrow \frac{10}{10}=100\%&\equiv 10\cdot\frac{2000}{7}=\frac{20000}{7}
\end{align}$$
The notation would be 
$$(P\%\equiv b)\text{ if and only if }(P\%\text{ of }x=b).$$
A: Nice answer Jimmy R.
But we can also solve it using proportion.
Since 2000 is 70 % of x.
Now, make the proportion,
$$\dfrac{2000}{x}=\dfrac{70}{100}$$
$$70x=200000$$
$$x=\dfrac{200000}{70}$$
$$x=2857\dfrac{1}{7}\approx2857.14$$
