1400= 2/5x

What about the 2?

Besides, the problem tells you that 1,400 is 2/5 of an unknown number. But 7,000 is half of 1,400.

1400 / (2/5) = 1400 * (5/2) = ?

Is the answer x= 3500

Yes.

Thanks a lot

You're welcome.

To solve the equation 1400 = (2/5)x, you need to isolate the variable x.

First, multiply both sides of the equation by 5 to undo the fraction:

1400 * 5 = (2/5)x * 5

This simplifies to:

7000 = 2x

To isolate x, divide both sides of the equation by 2:

7000 / 2 = 2x / 2

This simplifies to:

3500 = x

Therefore, the solution to the equation is x = 3500, not 7000.