Hello there!
So:
Write an equal sign on your paper. (=)
Now, there's a left and a right side.
On the left side, let's put the total there, and on the right side, we'll put everything else.
So what's the total amount spent? $21.04, right?
So put that on the left side.
21.04 =
Great! Now let's figure out the right side.
You know the monthly fee is $6. Since the $6 will never change, it's the constant. Since it's NOT the total, write it on the right side of your equal sign.
21.04 = 6
Fantastic! Now let's do the final step in making our equation!
"6 cents per minute," is an addition/add-on to the $6 constant, right?
So you're paying $6 as a constant, but you're ALSO paying 6 cents per minute. So the 6 cents would be adding on to the $6.
So it would be:
21.04 = 6+ 0.06
Right? Nope!
Notice how it was 6 cents PER MINUTE. Whenever you see a "per (unit)" you should add a variable!
So let's say 1 minute= m
So it would actually be:
21.04 = 6 + 0.06m
That's your equation!
P.S. It would be 0.06 and not 6 because 0.06 means 6 cents, whereas 6 means $6.
Now simply solve for m! (Or whichever variable you want).
Note that the equation can be
6 + 0.06m = 21.04
and still be correct! :)
If you have any questions, feel free to comment and I'll reply as soon as I can! :)
I hope this helped!! :)
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DISCLAIMER: I am not a professional tutor or have any professional background in your subject. Please do not copy my work down, as that will only make things harder for you in the long run. Take the time to really understand this, and it'll make future problems easier. I am human, and may make mistakes, despite my best efforts. Again, I possess no professional background in your subject, so anything you do with my help will be your responsibility. Thank you for reading this, and have a wonderful day/night!
