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Marianna [84]
3 years ago
8

What is the sum of the solutions of 2x [×-1]-4=-2

Mathematics
2 answers:
Sati [7]3 years ago
6 0
Lets get stated :)

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

Bring 4 to the right-hand side { You do addition to the opposite }
- 2x = - 2 + 4
- 2x = 2

Take - 2 to the other side in order to isolate x { Do division when you see multiplication }
\frac{-2x}{-2} = \frac{2}{-2}
x = -1

Quick check:
2 ( - 1 ) ( - 1 ) - 4 = - 2
2 - 4 = - 2
- 2 = - 2
So it is the correct value
Dafna11 [192]3 years ago
5 0
I believe the answer would be 2/4
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charle [14.2K]
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5 0
3 years ago
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When you have the number 81 as your median and you have to find the missing number out of the following 82,87,77,70,80,88
Natali5045456 [20]
Uh, so, you're median is 81 already.

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6 0
3 years ago
Help please!!
Reil [10]
I hope this helps you




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3 0
3 years ago
Solve for x and graph the solution on the number line<br> 15 &gt; 2x – 9 &gt; -23
Monica [59]

The answer is 12>x>-7

Step-by-step explanation:

it's first divided into 2 parts

1 . 15 > 2x - 9

2. 2x - 9 > -23

Then solve them individually.

let's do it,

<u>First half</u>

15 > 2x - 9

15+9 > 2x

24 > 2x

24/2 > x

12>x

<u>Second half</u>

2x-9>-23

2x>-23+9

2x>-14

x>-14/2

x>-7

<u>Joining of the two halves</u>

We have :

12>x>-7

8 0
3 years ago
HHHHHHEEEELLLLLLPPPPP
sveticcg [70]
<span>We want to check how many intersections line A and B have, that is, we want to check how many common solutions do these equations have:
</span>
i) 2x + 2y = 8

ii) x + y = 4
<span>
use equation ii) to write y in terms of x as : y=4-x, 

substitute y =4-x in equation i):

</span>2x + 2y = 8
2x + 2(4-x) = 8
<span>2x+8-2x=8
8=8

this is always true, which means the equations have infinitely many common solutions.


Answer: </span><span>There are infinitely many solutions.</span><span>

</span>
4 0
3 years ago
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