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3 years ago

Find number x, if when you add 7 to it and double the result you get 19 more than x.

Mathematics

2 answers:

vampirchik [111]3 years ago

7 0

Answer:

x = 5.

Step-by-step explanation:

We can set up equivalent equations like this to solve:

2(x + 7) = x + 19

Distribute the 2, giving us:

2x + 14 = x+ 19

Move the variables to one side, and the numbers to the other, giving us:

x = 5

morpeh [17]3 years ago

3 0

Answer:

x=5

Step-by-step explanation:

math is correct

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Answer:

179 minutes

Step-by-step explanation:

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3 years ago

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Answer with explanation:

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3 years ago

For thousand 400 is 10 times as much as 440

ss7ja [257]

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3 0

3 years ago

Read 2 more answers

You want to go to the skate park, and you have two options:

Tcecarenko [31]

Answer:

See Explanation

Step-by-step explanation:

Define the variables

Let the entry fee be c and the hourly rate be m

Let the number of hours be x and the total amount be y

Work to solve

For Sami's skate

$c = 6$ and $m = 2$

For Brad's skate

$c =10$ and $m = 1$

The equations

The equation is derived using: $y = mx + c$

For Sami's skate

$y = 2x + 6$

For Brad's skate

$y = x + 10$

When the cost are the same

To do this, we equate both expressions

i.e.

$y = y$

$2x + 6 = x + 10$

$2x -x = 10 - 6$

$x = 4$

i.e. the cost are the same at the 4th hour

What is the cost

Substitute 4 for x in any of the equations

$y = x + 10$

$y = 4 + 10$

$y = 14$

The cost is $14.00

3 0

2 years ago