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ss7ja [257]
4 years ago
14

The selling price for a classic speedboat is $12,000. what was the speedboats original price if it is currently selling for $2,0

00 less than two times its original price?
Mathematics
1 answer:
dangina [55]4 years ago
4 0

Answer:

$7,000

Step-by-step explanation:

Let x equal the original price.

12,000+2000=2x

Combine like terms.

14,000=2x

Divide by the coefficient of x, which in this case is 2.

7,000=x

If you like the variable on the left, rewrite:

x=7,000

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Because 2x = 0.125, we'll divide 0.125 by 2 to het the answer. (0,125 ÷ 2 = 0.0625)

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3 years ago
Emily is 4 times as old as Tiffany. In ten years time, Emily will be twice as old as Tiffany . Find their ages.​
Sholpan [36]
<h3><u>Question</u><u>:</u></h3>

Emily is 4 times as old as Tiffany. In ten years time, Emily will be twice as old as Tiffany. Find their ages.

<h3><u>Solution</u><u>:</u></h3>
  • Let the age of Tiffany be x years.
  • Then, the age of Emily = 4x years.
  • After 10 years, the age of Tiffany will be (x+10) years.
  • After 10 years, the age of Emily will be (4x+10) years.
  • Therefore, by the problem

4x + 10 = 2(x + 10) \\  = 4x + 10 = 2x + 20 \\   = > 4x - 2x = 20 - 10 \\  =  > 2x = 10 \\  =  > x =  \frac{10}{2}  \\  =  > x = 5

  • So, Tiffany's present age = 5 years.
  • Emily's present age = (4×5) years = 20 years.
<h3><u>Answer:</u></h3>

Emily's age is 20 years and Tiffany's age is 5 years.

Hope it helps!

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