5x-2x=
7a-(-4a)=
-9y+5y-(-12y)+2y=
3s-7s+6s+(-2s)=
2006-07-11 05:22:22 · 10 answers · asked by poeticjust_4us 1 in Science & Mathematics ➔ Mathematics
5x-2x=3x
7a-(-4a)=11a
-9y+5y-(-12y)+2y=10y
3s-7s+6s+(-2s)=0
2006-07-11 05:27:06 · answer #1 · answered by teij 2 · 0⤊ 1⤋
Dude, what grade are you in? This is simple Algebraic Expressions.
5x-2x=3x
7a-(-4a)=11a
-9y+5y-(-12y)+2y=10y
3s-7s+6s+(-2s)=0
Thanks for the 2 points! Hope ya give me another ten.
2006-07-11 22:58:30 · answer #2 · answered by Firdaus Yosman 3 · 0⤊ 0⤋
5 apples minus 2 apples = 3 apples
if you have 7 dollars and I remove a debt of 4 dollars... you're worth 11 dollars ...
-9 ... +5 = -4 ... -(-12) = 8 +2 = 10y's
3 - 7 = -4 + 6 = 2 -2 = 0
2006-07-11 12:27:31 · answer #3 · answered by Brian D 5 · 0⤊ 0⤋
Tips:
1. The letter represents a specific number you need to solve for. (In more complex math, it can represent more than one number).
2. It may help to think of the letter as an object like "apples". (ie 5"apples" minus 2"apples" equals...
3. A negative times a negative equals a positive.
2006-07-11 12:29:01 · answer #4 · answered by victorygirl 3 · 0⤊ 0⤋
The answers that "i_ball_4_lyfe" gave are correct and just remember that you can add and subtract like signs....like 5x and 2x have the same x-variable so they can be added or subtracted from each other.
2006-07-11 12:52:08 · answer #5 · answered by JusME 2 · 0⤊ 0⤋
5x-2x = 3x
7a-(-4a) = 11a minus a minus is a plus
the others are similar. just add and subtract
2006-07-11 12:27:21 · answer #6 · answered by jamie 4 · 0⤊ 0⤋
5x-2x = (5-2)x
7a-(-4a) = (7-(-4))a = (7+4)a
You get the picture.
2006-07-11 12:26:12 · answer #7 · answered by bequalming 5 · 0⤊ 0⤋
I'd get back out of school, it's not helping you.
Just keep practicing this:
"What would you like me to brush up next?"
2006-07-11 12:25:36 · answer #8 · answered by Anonymous · 0⤊ 0⤋
1) 3x
2)11a
3)10y
4)0
2006-07-11 12:27:49 · answer #9 · answered by Prakash 4 · 0⤊ 0⤋
3x
11a
10y
0
wow man your smart..
2006-07-11 12:26:16 · answer #10 · answered by i_ball_4_lyf 2 · 0⤊ 0⤋