Solutions for Literal Number Exercise

Math for Electronics Methods for Solving Equations
8 minutes
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Transcript

All right, first one here A B equals C, find a, a alone divide a B on each side. Here's my answer. Okay, a plus b equals C. We want to find a, what do I do? I subtract a B from both sides. Here's my answer. Okay, V equals i times r i want to find i right there.

So what do I do? I divide in from both sides. Here's my answer. Okay, I equals V over R I want to find v Okay, what do I do? I multiply by an R on each side. All right, P equals v times I am trying to solve for AI.

So what do I do? As my answer? Okay, q equals c times V, find c My answer. All right, C equals q over V. I want to find Q. As my answer is it doesn't matter. I can say CV or VC.

All right, here we go. Okay, this one here, P equals i squared r find i right there. Well, what do I do? p i squared divide in our Whoops, the wired in our glide in our Okay. Then what do I do? whereas my answer so I go p equals i squared R I want to find I, okay, so P I divide in our from each side here here.

P over R Equals ice squared like I show you right there. All right. So I want to get I alone, so I take the square root of i squared. So what I do on one side of the equation, I've got to do another. So now the square root of i squared is i p over R is at its simplest form with the radical around it. So here's my answer, square root of P over r equals I.

Okay, I equals pi D. And by the way, if I didn't say it, this symbol is the symbol for pi pi right there. Okay? So that is the PI symbol. Okay, so I want to get d alone. So what do I do y divided by pi I have I divided by pi equals D is my answer. Now, if you look at the original slide, there's a there it is wrong.

That is wrong. There's a actual a radical sign over this here. And that is wrong. So there was no radical sign. No. Okay.

All right, let's go on. Okay, y equals a times b times x, I want to find x. So what do I do? Well, I can divide and AB on both sides. Here's my answer. Okay, we have x equals two pi FL, I'm looking to find l right there.

Two pi f, two pi, F and y. And if I didn't say it the reason I can do these because these affect doors. Alright, factors we can multiply and divide factors together. So these cancel out. And I'm left with x over two pi f, and that will equal L. There's my answer right there. Okay, on this one here, we have y equals A minus B over x, we want to find x.

So x and then x over there. So I have x Y equal a minus b because the x's cancel out, I want to get x alone divided by y divided by A y. So I have x equals A minus B over y is my answer right there. All right, on this one here, we have four x squared equals 100. And I want to find x so I need to get x alone. So I can divide a four on both sides.

All right, get rid of that. So now I've got x squared. 100 divided by four is 25. Okay, I want to get x squared alone. What I do on one side of the equation I have to do to the other square root of x squared is x the square root of 25 is five, x equals five. There's my answer.

Okay, we've we've done them all. This concludes this section. We will see you in the next section.

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