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stiks02 [169]
3 years ago
6

I need help here please..! I took a picture of the Multi -Step equations..!

Mathematics
1 answer:
r-ruslan [8.4K]3 years ago
6 0
There are 8 problems in the picture.  What you need is for someone to give you
some tips and solve one or two of them. 
Giving you a bunch of answers and nothing else does NOT help you.

Here are my tips to you:

A).  You're always trying to find the number that the unknown letter must be equal to,
in order to make the equation a true statement.  That's the solution to the equation,
and the 'answer' to the problem.  

B).  Always do what you have to do in order to get the letter all by itself on one side.

C).  Whatever you do to one side of the equation, you must do to the other side.

==========================================

Examples, from the picture:

<u>#3:</u>  <u>8x - 2 = -9 + 7x</u>    What can you do to get the 'x' all alone on one side?

Subtract 7x from each side:    x - 2 = -9

Add 2 to each side:            <u>x = -7</u>
===========================================
<u>#2:</u>  <u>6 = 1 - 2n + 5</u>  

Combine the 1 and the +5 on the right side:      6 = 6 - 2n

What can you do to get the 'n' all alone on one side?

Subtract 6 from each side:      0  =  - 2n

Divide each side by -2 :      <u> 0 = n</u>
===========================================
<u>#5:</u>  <u>4m - 4 = 4m</u>

Subtract 4m from each side:    - 4 = 0

There is no number for 'm' that can make -4 equal to zero.
So this equation has <u>no solution</u>.
(That's OK.  Not every equation must have a solution.)


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Sum of two numbers is 42 and their difference is 8 . Find the numbers ?​
worty [1.4K]

Answer:

25 and 17

Step-by-step explanation:

25+17=42

25-17=8

7 0
2 years ago
8.1 = 0.9a, how do you solve?
GrogVix [38]

Answer:

a = 9

Step-by-step explanation:

Simplifying

8.1 = 0.9a

Solving

8.1 = 0.9a

Solving for variable 'a'.

Move all terms containing a to the left, all other terms to the right.

Add '-0.9a' to each side of the equation.

8.1 + -0.9a = 0.9a + -0.9a

Combine like terms: 0.9a + -0.9a = 0.0

8.1 + -0.9a = 0.0

Add '-8.1' to each side of the equation.

8.1 + -8.1 + -0.9a = 0.0 + -8.1

Combine like terms: 8.1 + -8.1 = 0.0

0.0 + -0.9a = 0.0 + -8.1

-0.9a = 0.0 + -8.1

Combine like terms: 0.0 + -8.1 = -8.1

-0.9a = -8.1

Divide each side by '-0.9'.

a = 9

Simplifying

a = 9

5 0
3 years ago
A CD usually sells for $14.00. If the CD is 20% off, and sales tax is 7%, what is the total price of the CD, including tax?
tankabanditka [31]

Answer:

the total price of the CD including tax is $11.984

Step-by-step explanation:

The computation of the total price of the CD including tax is shown below:

The Selling price of the CD is $14

CD is 20% off

And, the sales tax rate is 7%

So, the total price of the CD is

= ($14 - $14 × 20%) × (1.07)

= $11.2 × 1.07

= $11.984

Hence, the total price of the CD including tax is $11.984

8 0
2 years ago
What is 2940 divided by 8
emmainna [20.7K]

367.5, there are 367.5 8's in 2,940.

Hope this helps, if not, comment below please!!!!

8 0
3 years ago
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in your math class there are 2 Boys for every 3 girl.which of the following be the ratio of Boys and girl in the class?​
4vir4ik [10]

Answer:

B. 14/21

Step-by-step explanation:

4 0
3 years ago
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