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lakkis [162]
3 years ago
14

Compare 3 + (–4) to (–4) + 3. What happens to the sum when the addends are reversed?

Mathematics
1 answer:
slamgirl [31]3 years ago
6 0
The sum stays the same??? I’m pretty sure that’s the answer
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How many solutions for x does the following equation have? 2(x + 4) − 1 = 2x + 7
4vir4ik [10]

Answer:

The equation has infinity solutions

Step-by-step explanation:

we have

2(x+4)-1=2x+7

Applying distributive property left side

2x+8-1=2x+7

Combine like terms

2x+7=2x+7

The linear equation of the left side is equal to the linear equation of the right side

Both lines are identical

therefore

Is a consistent dependent system

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8 0
3 years ago
What is the value of x in the equation x – y = 30, when y = 15?
lord [1]

(2/3)(30)=20
30+20=50=(x/5)
(50*5)=x=250 

hope this helps

5 0
3 years ago
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Help me find the value of X
RideAnS [48]

Answer:

B.  x =  53 degrees.

Step-by-step explanation:

The external angles of all polygons add up to 360 degrees, so:

x +  120 + 90+ 97 = 360

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8 0
3 years ago
-3+3x=-2(x+1)<br> the 2 is a negative<br> please break it down
Veronika [31]
-3+3x=-2(x+1) First: I will get rid of the bracket:


-3+3x=-2x-2

Now, all the x goes to the left side, all the numbers without x to the right side:


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we add up"

5x=1

divide by 5:

x= \frac{1}{5}

7 0
3 years ago
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Solving systems of equations by substitution -2x-3(6-11)=-7
Papessa [141]

Answer:

11

Step-by-step explanation:

Simplify both sides of the equation.

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Divide both sides by -2.

x = 11

3 0
3 years ago
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