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topjm [15]
3 years ago
5

The value of x in the question

Mathematics
1 answer:
Gala2k [10]3 years ago
7 0
1. 3x-10=x+70
      +10  -x
   2x=80
    x=40 

2. x+27+2x-39=180
   3x-12=180
       +12 
   3x = 180
   x = 64

3. 2x ÷ 80=5x+44
    - 2x             -44
         36= 3x 
          12=x 
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Answer:

+ 1) is an even number.

Take any n ∈ N, then n is either even or odd.

• Suppose n is even ⇒ n = 2m for some m ⇒ n(n + 1) = 2m(n + 1) ⇒ n(n + 1) is even.

• Suppose n is odd ⇒ n+ 1 is even ⇒ n+ 1 = 2m for some m ⇒ n(n+ 1) = 2nm ⇒ n(n+ 1)

is even. QED

2. The sum of the first n natural num

Step-by-step explanation:

a>50A is greater than 50

a<50a<50

a≥50A is greater than or equal to 50

a≤50

7 0
3 years ago
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Assoli18 [71]

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Nonamiya [84]

Answer:

-23

Step-by-step explanation:

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2. When we multiply any number by 1, that number will stay the same.

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Therefore, the answer is -23!

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2 years ago
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WITCHER [35]

Answer:

A

Step-by-step explanation:

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