# Thread: How to Rearrange formula? Solve 2(Pc - d) / Pc for Pc

1. Originally Posted by mmm4444bot
That's correct. Here's a note about typing math.

When we write the algebraic ratio $\frac{2d}{2 - A}$ with paper and pencil, it's easy to see the denominator of the ratio because we use a horizontal fraction bar.

We cannot type a horizontal fraction bar, so we must use grouping symbols (shown above in red) to make clear what's on the top (numerator) and what's on the bottom (denominator).

Typing the expression 2d/2-A means this:

$\dfrac{2d}{2} - A$

But typing 2d/(2 - A) means this:

$\dfrac{2d}{2 - A}$

If you're a student or you need to do algebra at work, I recommend that you take the time to study beginning algebra. There are lots of free courses and textbooks available on-line. Cheers, and watch out for those hot bolts.
MMM4444BOT, Thank you for your assistance, I am a Boiler Inspector Trainee getting ready to take certification exam in the next month. There are various formulas for figuring a lot of information out within the ASME for construction of boilers, but that one is the one I was having problems with. I have taken the algebra courses, but don't use very often. Thank you very much and I appreciate your time.

2. You're welcome, and good luck.

As an aside, if you're ever in San Diego, I recommend touring the USS Midway. I went through that aircraft carrier about 14 months ago. They used steam to power a lot of stuff, and I was amazed how much equipment was crammed into that ship. I think you'd find it interesting, seeing how things used to be done. Plan on spending 6 to 8 hours onboard. (Click thumbnails to enlarge.)

hb2.JPG

hb1.JPG

3. Originally Posted by mmm4444bot
You're welcome, and good luck.

As an aside, if you're ever in San Diego, I recommend touring the USS Midway. I went through that aircraft carrier about 14 months ago. They used steam to power a lot of stuff, and I was amazed how much equipment was crammed into that ship. I think you'd find it interesting, seeing how things used to be done. Plan on spending 6 to 8 hours onboard. (Click thumbnails to enlarge.)

hb2.JPG

hb1.JPG
I was a Boiler Technician in the early 90's onboard the USS Kiska, although can't compare to the Midway, I know how the work was and the equipment. They don't let much room go to waste on the war ships. The Missouri in Hawaii is another great example.

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