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Rom4ik [11]
3 years ago
5

+ x = 12 – 2x what is this?

Mathematics
2 answers:
AleksAgata [21]3 years ago
7 0

Answer:

x= -6

Step-by-step explanation:

o-na [289]3 years ago
5 0

Answer:

x=4

Step-by-step explanation:

+x=12 - 2x

(2x goes to the other side)

+x+2x=12

3x=12

3x÷3=12/3

x=4

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Find the mean please
zysi [14]

Answer:

199.5

Step-by-step explanation:

Add all the numbers and divide by  number of responses aka 6

6 0
3 years ago
Which equation shows the result of 42 divided by 15?
KatRina [158]

Answer:

42=2×15+12

Step-by-step explanation:

2×15=30

therefore 30+12=42

5 0
4 years ago
-2/3 x -9/8 x -4/5 x -1
Lerok [7]

Answer: 0.6

Step-by-step explanation: First, you want so seperate the equations in parenthesis to make solving the equation easier.

(-2/3x-9/8x )-(4/5x)-(1)

So (-2/3x-9/8x) equals -11/24x

And  -11/24x-4/5x equals -151/120x

So -151/120x-1 ends up being 0.6.

5 0
3 years ago
If 21 is added to a number the result is 40 less than twice the number what is the number?
Karolina [17]
If 21 is added to (+ 21) a number (x) the result (=) is 40 less than (- 40) twice the number (2x)

x + 21 = 2x - 40   Add 40 to both sides
x + 61 = 2x           Subtract x from both sides
      61 = x             Switch the sides to make it easier to read
       x = 61


7 0
3 years ago
I need some help if you could
Fed [463]

Step-by-step explanation:

35A) arc AC = 360-(100+110+80)=

360-290 = 70°

35B) <em>L</em><em> </em>D = ½× 70 = 35°

35C) <em>L</em><em> </em>AEC = ½(100+70)=½×170= 85°

35D) <em>L</em><em> </em>P = ½(100-70) = ½×30 = 15°

5 0
3 years ago
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