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PLEASE HELP ME WITH THE FOLLOWING:
SIMPLIFY AND EXPAND THE FOLLOWING:
1 - 7X-3X
2 - 5Y-7Y
3 - -8Y+3Y
4 - -6X_7X
5 - 4X+3Y+5X+6Y
6 - 3(X+Y)+Y

HOW THE HELL CAN I WORK THESE OUT!!!

2007-11-18 09:13:04 · 5 answers · asked by Anonymous in Education & Reference Homework Help

5 answers

If the letters are the same, ignore them, and just do the math. Then put the numbers back at the end.

1: 7-3 = 4x
2: 5-7 = -2y
3: -8+3 = -4y
4: -6-7 = -13x

For this one, you need to combine the ones with the same letter:
5: 4+5 = 8; 3+6 = 9, so 8x+9y

This one you need to distribute out, then combine the letters that are the same:
3x+3y+y = 3x+4y

2007-11-18 09:37:25 · answer #1 · answered by Ditdah 2 · 0 0

1 - 7X-3X
= -7x + -3x (you get to re-write it this way if you'd like)
= -10x

2 - 5Y-7Y
= -5y + -7y (same thing)
= -12y

3 - -8Y+3Y
= 8y +3y (two negatives equals a positive)
= 11y

4 - -6X_7X
= 6x-7x (again .. two negatives ...)
= -1x

5 - 4X+3Y+5X+6Y
=-4x + 6x + 3y + 6y (group your variables together .. you can't put y's and x's together, so your answer will have both an x and a y in it)
= 2x + 9y

6 - 3(X+Y)+Y
* distributive property *
= -3x - 3y + 1y (multiply -3 by both x AND y)
= -3x - 2y (add/subtract like variables)

2007-11-18 09:25:24 · answer #2 · answered by djdubs 3 · 0 0

1 - 7X-3X
This is adding two negative numbers, so -10x

2 - 5Y-7Y
again, adding two negative numbers, so -12y

3 - -8Y+3Y
do you really mean --?
In that case --8y = +8y, so 11y
otherwise -8y + 3y = -5y

4 - -6X_7X
assume you mean --6x - 7x = +6x - 7x = -x
if you mean -6x - 7x, then -13x

5 - 4X+3Y+5X+6Y
just add the x's and y's separately
-4x+5x = x
3y + 6y = 9y
so, x + 9y

6 - 3(X+Y)+Y =
-3x - 3y + y =
-3x -2y

2007-11-18 09:24:33 · answer #3 · answered by Steve A 7 · 0 0

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2016-12-16 12:26:22 · answer #4 · answered by selders 4 · 0 0

you got some work ahead of ya!

2007-11-18 09:21:06 · answer #5 · answered by All That Glitters isn't Gold 5 · 0 1

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