Question

Solving Equations
3=r/16+4
What does r equal?
Please show all work.
Ms. Sue
Do it the same way I showed you for the last problem.

If you post your answer, I'll be glad to check it for you.

j
Okay. 3=r/16+4 My teacher told me to cross multiply so:
16x4=64
Then I get lost because I don't know the next step except to subtract three from both sides which gives you r/16=43.























































Ms. Sue
I don't think you understood your teacher.

Here's my way of solving this problem.

3=r/16+4

We need to get the known quantities on one side of the equation. In this problem, we subtract 4 from each side.

3 - 4 = r/16 + 4 - 4

-1 = r/16

Multiply both sides of the equation by 16

-1 * 16 = r

-16 = r

Let's check it.

3=r/16+4

3 = -16/16 + 4

3 = 4 - 1

3 = 3

Yep! It works!




j
Oh. That makes more sense. Thank you. I have four more problems so I will work one more out so you could check it.
-11=v/2-6
Add 6 to each side
-11+6=v/2-6+6
-5=v/2
-5x2=v
v=-10
Is this correct Mrs. Sue?
Ms. Sue
Yay! You're right!

j
Yay!! Thank you so much Mrs. Sue you really helped me!
Ms. Sue
You're very welcome, j. :-)