math homework help?
the directions are to simplify the expression:
1. -6x +10x + (-2x)
2. 20x + (-16x) + (-2x)
3. 6x + (-2x) + x + 7
4. 4x + (-x) + (-2x)
5. 15x + (-3x) + 7x + 4
pls. & thnk u! if u have a stupid answer (like 2 points.), then dont even answer.
sorry!
Favorite Answer
#1. -6x+10x+(-2x)
You add together all the #s because they all have the same variable “X”.
-6x+10x+(-2x)
add -6x and 10x
4x+(-2x)
add 4x and -2x
2x is your answer
Now you try the others!
Do you know the order of operations – My Dear Aunt Sally? (Multiplication, Division, Adition, Subtraction)
1. -6x + 10x – 2x
add -6x and 10x to get the answer 4x. (10x – 6x)
subtract the 2x from the 4x.
The answer to this one is 2x.
2. 20x – 16x – 2x
subtract 16x from 20x. The answer is 4x. Now subtract the 2x from the 4x.
The answer to this one is 2x as well.
And so on –
3. 6x – 2x + x + 7 simplifies to 5x + 7
4. 4x – x -2x simplifies to x (or 1x)
5. 15x – 3x + 7x + 4 simplifies to 19x + 4
Hope I helped!
When you see +(-x) this can be simplified as just minus, so + ( -3x) is the same as minus 3x. The first one is done this way:
-6x + 10x -2x = +10x – 8x = 2x
1. Make it easier. Negatives will always overrule a positive.
-6x+10x-2x
10x-8x
=2x
2. 20x-16x-2x
4x-2x
=2x
3. 6x-2x+x+7
=5x+7
4. 4x-x-2x
4x-3x
=x
5. 15x-3x+7x+4
12x+7x+4
=19x+4
1. 2x
2. 2x
3. 5x + 7
4. x
5. 19x + 4
.
2. 2x
3. 5x+7
4. x
5.19x+4
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