please help with solving 3.7 = r / 5.4

S

shortstuff0413

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Jan 16, 2007
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This is my new problem:

. . .3.7 = r / 5.4

Can someone please explain in steps how to do it? Thank you!
 
If you had "3 = r / 2", would you know how to solve?

If so, then do the same thing here, but with decimal numbers instead of whole numbers. If not, then we'll see about finding you some online lessons for solving one-step linear equations.

Thank you.

Eliz.
 
The equation

3.7 = r / 5.4

says that the result when a number "r" is divided by 5.4 is 3.7. So, how do we find out what "r" was?

We need to "undo" the division by 5.4. The operation which "undoes" division is multiplication. Since r was divided by 5.4, we'll MULTIPLY by 5.4....but, if we multiply one side of an equation by something, we must do the same thing to the other side to keep the equation "balanced."

Multiply both sides of the equation by 5.4:

(5.4)(3.7) = (5.4)(r / 5.4)

On the right side, the multiplication by 5.4 undoes the division by 5.4, leaving just r. On the left side there is a calculation that you can do.

I hope this helps you.
 
shortstuff0413 said:
i still don't get it can u explain it in more detail
Click to expand...
If you don't know even how to get started on "3 = r / 2", then it would appear that you need much more help than we can provide here. (Since the questions on your test will be different from this one, giving you the answer to this particular exercise won't, unfortunately, help much.)

Please spend at least a few hours studying some of the lessons available online. If you find you are still lost, then please consider hiring a tutor who can work with you, face-to-face, for a few hours a week (daily would be best) so you can get caught up.

My best wishes to you in your studies.

Eliz.
 
Hey Shorty, this may help you:

if a/x = b/y, then ay = bx

And don't forget that a/x = b is the same as a/x = b/1, so a*1 = b*x, a = bx.
 
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