Math Help Please?

Question

Add or subtract as indicated. Express your result in simplest form.

2 / 5w + 10 - 3 / 2w - 4

Answer 1

2 / 5w + 10 - 3 / 2w - 4

WRite them as frations.... GOING DOWN:
.......2....+10.....-..3.....-4
......5w...+..........2W......
Be sure to make your whole numbers fractions by putting "1" under them.

.......2
......5w
.....+10
........1
......-3
......2W
....-4
.....1
...............
These are fractions, you need a common denom....
common denom of 5 & 2 is 10
common denom of w & w is w
common denom is 10w

Use the common denom to make EQUIVALENT fractions:

.......2.......X2....->....4..........4
......5w......2....->....10w
.....+10......X10w->....100w....100w
.......1........X10w->....10w
......-3.........X5....->....15.......15
......2W......X5....->....10w
.......-4........X10w->....4w.......4w
........1........X10w->....10w
_________________________

Then, add NUMERATORS ONLY
and put over the common denom
4+100w+15+4w
.........10w........
Finally, Simplify by combining common terms
(19+104w)
....10w....

(19+104w)/10w

Answer 2

-11/10w+6

you mulitply the fractions by the denominators so you can add the fractions:
2/5 x 2/2= 4/10
-3/2 x 5/5= -15/10
you multiply by 2/2 and 5/5 because they're both equal to one, and multiplying a number by one doesn't change the value of the number.

Answer 3

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Answer 4

-11/10w + 6

Answer 5

What does the w stand for???