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cestrela7 [59]
3 years ago
7

X - 3= -21 This is so confusing:(​

Mathematics
2 answers:
denis-greek [22]3 years ago
8 0

Answer:

x = -18

Step-by-step explanation:

x - 3 = -21

add 3 to both sides

x - 3 + 3 = -21 + 3

x = -18

sidenote: you can add anything to both sides of an equation, and it'll still be true. for example, 2 = 2, if you add 1 to both sides you get 3=3 which is still true.

Aneli [31]3 years ago
6 0

Answer:

\huge\boxed{x=-18}

Step-by-step explanation:

In order to solve this, we are trying to find the value of x. Basically, x is a placeholder for a number that is unknown. Some number minus 3 is equal to 21.

Our goal is to find x. To do this we want to isolate x on one side of the equation

x-3=-21

Let's add 3 to both sides.

x-3 + 3 = -21+3\\\\-3 + 3 = 0\\\\x = -21+3\\\\x=-18

Hope this helped!

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Mekala has an MP3 player called the Jumble. The Jumble randomly selects a song for the user to listen to. Mekala's Jumble has 4
sammy [17]

Answer:

Mekala Jumble has 4 techno songs, 2 country songs, and3 jazz songs on it.

Ratio of techno songs,to country songs,to jazz songs= 4: 2 : 3

Whatever be total  number of songs, let the number of techno songs, country songs,and jazz songs be  4 x,  2 x, and  3 x.

Total number of songs that Mekala plans to Listen = 2 70

Then , 4 x + 2 x + 3 x= 270

9 x = 270

Dividing both sides by 9, we get

x = 30

So, Number of techno songs = 4 × 30= 120

Number of techno songs = 2 × 30= 60

Number of jazz songs = 3 × 30= 90

Option (b) b) Close to 60 country songs but probably not exactly 60 country songs  ,is true option regarding number of songs listen by Mekala.

Step-by-step explanation:

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3 years ago
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Westkost [7]
I hope someone solves your problem :)
7 0
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Simplify (8x^2 - 1 + 2x^3) - (7x^3 - 3x^2 + 1).
Elenna [48]

Answer:

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Step-by-step explanation:

7 0
3 years ago
Which of the following is an extraneous solution of startroot 4 x 41 endroot = x 5? x = –8 x = –2 x = 2 x = 8
Gnom [1K]

The extraneous solution of startroot 4 x 41 endroot = x 5 will be A. -8.

<h3>What is an extraneous solution?</h3>

It should be noted that an extraneous solution simply means a root of a transformed equation which isn't part of the original equation.

✓4x + 41 = x + 5

Square both sides

4x + 41 = x² + 10x + 25

x² + 6x - 16

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x + 8 = 0

x= 0 + 8 = 8

Learn more about extraneous solution on:

brainly.com/question/295656

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7 0
2 years ago
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Dominik [7]

Answer:

Hunter's sister is 4.53 feet tall.

Step-by-step explanation:

4.52 x 0.75 = <u>3.39 feet</u>


4 0
3 years ago
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