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Ugo [173]
4 years ago
6

How do I do this 3x + 5.2 = 2 - 5x

Mathematics
2 answers:
Sophie [7]4 years ago
5 0

Answer:

x = -.4

Step-by-step explanation:

3x + 5.2 = 2 - 5x

Add 5x to each side

3x+5x + 5.2 = 2 - 5x+5x

8x +5.2 = 2

Subtract 5.2 from each side

8x +5.2 - 5.2 = 2-5.2

8x = -3.2

Divide each side by 8

8x/8 = -3.2/8

x = -.4

Slav-nsk [51]4 years ago
5 0

Answer:

x= -0.4

Step-by-step explanation:

3x+5.2=2-5x

<em>Add 5x to both sides</em>

8x+5.2=2

<em>Subtract 5.2 from both sides</em>

8x= -3.2

<em>Divide both sides by 8</em>

x= -0.4

I just realized my answer is really similar to Wegnerkolmp2741o so sorry if it seems like I'm copying them.

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An AP consists of 55 terms of which 5th term is 14 and last term is 144. Find the 29th term
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Answer:

29th term = 76.4

Step-by-step explanation:

Total terms = 55

aₙ = a + (n - 1) d

5th term = a₅ = 14

   a + (5 - 1)*d = 14

   a + 4d = 14  --------------------(I)

last term = a₅₅ = 144

               a + (55 - 1)d = 144

      a + 54d = 144----------------(II)

Multiply equation (II) by (-1)

(I)             a +  4d = 14

(II)*(-1)     <u>-a - 54d = -144</u>  {Now add and thus a will be eliminated}

                   -50d = -130

 d = -130/-50

d = 2.6

Plug in d = 2.6 in equation (I)

a + 4* 2.6 = 14

  a  + 10.4 = 14

              a = 14 - 10.4

              a = 3.6

29th term = a₂₉ =  3.6 + (29 - 1)* 2.6

                          = 3.6 + 28* 2.6

                          = 3.6 + 72.8

                     a₂₉ =  76.4

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This would become 4(-6) + 6 divided by 6.

You can then multiply 4 and -6 together,

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You can then divide -18 by 6,

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