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tiny-mole [99]
1 year ago
6

Solve the equation 3x + 4 = 5x - 8​

Mathematics
2 answers:
11Alexandr11 [23.1K]1 year ago
5 0

Answer:

x = 6

Step-by-step explanation:

  1. 3x + 4 = 5x - 8
  2. 3x - 5x = - 4 - 8
  3. - 2x = - 12
  4. x = 6
CaHeK987 [17]1 year ago
3 0

Answer:

x = 6

Step-by-step explanation:

3x + 4 = 5x - 8

==> add 8 to both sides

in doing so we get 3x + 4 + 8 = 5x - 8 + 8

the -8 and the +8 cancels out and 4 + 8 = 12

we are left with 3x + 12 = 5x

==> subtract 3x from both sides

in doing so we get 3x - 3x + 12 = 5x - 3x

the 3x and -3x cancel out and 5x - 3x = 2x

we are left with 12 = 2x

==> divide both sides by 2

in doing so we get 12/2 which equals 6 and 2x/2x which leaves us with

6 = x

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FromTheMoon [43]

Answer:

  • median: 15
  • base: 18

Step-by-step explanation:

The median is the average of the lengths of the two bases:

  5x -20 = (12 + (4x -10))/2

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  3x = 21 . . . . . add 20-2x

  x = 7

Then the lengths are ...

  median = 5x -20 = 5·7 -20 = 15

  base = 4x -10 = 4·7 -10 = 18

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2 years ago
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lara [203]

Answer:

75 degrees

Step-by-step explanation:

let x unknown number

5x+10x+9x=180

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10x

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7 0
2 years ago
Find x,y and 2. (leave answer in simplest radical form) *
True [87]

Answer:

x = 32

y = 16sqrt(5)

z = 8sqrt(5)

Step-by-step explanation:

x/16 = 16/8

x/16 = 2

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y^2 = 1280

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2 years ago
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wlad13 [49]

Answer:

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Step-by-step explanation:

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3 0
3 years ago
A certain taxi driver charges a rate of r cents per person per mile. How much money, in dollars, would it cost three people to t
Anika [276]

Answer:

It would cost ( 3xr/200) dollars  to three people to travel x miles.

Step-by-step explanation:

Here, according to the question:

The rate of the taxi fare = r cents per person per mile

The total number of people travelling = 3 friends

Each person travels x miles.

So, the total distance traveled by 3 friends

= 3  ( Distance traveled by 1 friend) = (3 x) miles

Now, as each mile costs r cents.

So, the cost of travelling (3 x) miles  = ( 3 x) (r)  cents   .... (1)

Also, 100 cents = $ 1

So,  1 cent = (1/100) dollars

⇒ r cents  = (r/100) dollars

So, the cost of travelling (3 x) miles  = ( 3xr/100) dollars  .... (2)

Now, If he gives them a 50% DISCOUNT.

Then the cost of travelling (3 x) miles  = ( 3xr/ 2 x 100) dollars  

= ( 3xr/200) dollars  

Hence,it would cost ( 3xr/200) dollars  to three people to travel x miles.

4 0
2 years ago
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