1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Akimi4 [234]
3 years ago
12

Pls help me i need help

Mathematics
2 answers:
Llana [10]3 years ago
8 0

Answer:

3x was subtracted from the left side, but 3x was subtracted from the right side. The Subtract Property of Equality states that you can subtract the same number from each side and the equation will remain true. But 3x and 3 are not the same number (unless x is 1).

x = -8/5

Step-by-step explanation:

Step 1: Simplify both sides of the equation.

  • (7x+3x)+(21)=5
  • 10x + 21 = 5

Step 2: Subtract 12 from both sides.

  • 10x + 21 - 21 = 5 - 21
  • 10x = -16

Step 3: Divide both sides by 10.

  • \frac{10x}{10} = \frac{-16}{10}
  • x = -\frac{8}{5}
AnnyKZ [126]3 years ago
4 0

9514 1404 393

Answer:

  • 3x
  • 3
  • 1
  • x = -1.6

Step-by-step explanation:

You answer this sort of question by comparing each line to the line above to see what the differences are. In the second line, the term 3x is missing from the left side of the equal sign, and the value 5 has been changed to the value 2 on the right side. The wording of the statement you're to fill in tells you that it should read ...

  <u> 3x </u> was subtracted from the left side, but <u> 3 </u> was subtracted from the right side.

  ... 3x and 3 are not the same number (unless x is <u> 1 </u>.)

__

The correct solution is ...

  7x +21 +3x = 5 . . . . . . given

  10x +21 = 5 . . . . . . . . . collect terms

  10x = -16 . . . . . . . . . . . subtract 21 from both sides

  x = -1.6 . . . . . . . . . . . .  divide both sides by 10

_____

<em>Additional comment</em>

It can often work well to "read ahead" when answering a question or series of questions. The later questions or comments often provide clues that help you understand how to answer the earlier questions.

Here, for example, it becomes clear that 3x and 3 were subtracted from the different sides of the equation. You can find that out simply by reading the rest of the statement you're to fill in. These are the answers to the questions asked in the first part of the statement.

You might be interested in
The base of a triangle is represented by (2x − 6) and the height by (x − 2). Which polynomial expression BEST represents the are
BabaBlast [244]
Area of a triangle= \frac{1}{2} *base*height
A=\frac{1}{2} *(2x-6)*(x-2)
A=\frac{1}{2} ( 2x^{2} -4x-6x+12)
A=x^{2} -2x-3x+6
A=x^{2} -5x+6
7 0
3 years ago
Read 2 more answers
Maria earns $48 every three hours she works. How much will she earn by working 13 hours?
Valentin [98]

Answer:

$624

Step-by-step explanation:

48 x 13

5 0
3 years ago
Read 2 more answers
A jet flies at an altitude of 52800 feet what is the height of the jet in miles
marysya [2.9K]
1 mile=5280 feet how about 52800
1 x 52800 divided by 5280=10 miles
8 0
3 years ago
Read 2 more answers
4/5 n = 9/10<br>solve n
Alex787 [66]
N =9/8
n = 1 1/8

Hope this helpsb☺
6 0
3 years ago
You want your daily sodium intake to be less than 2300 milligrams. For breakfast, you eat a cereal bar with the nutrition label
ipn [44]

According to the information in the nutritional table, it can be inferred that the amount of milligrams of sodium that we should consume during the rest of the day must be less than 2,175mg,

<h3>How to calculate the amount of sodium we can consume?</h3>

To calculate the amount of sodium that we can consume during the rest of the day after breakfast, we must subtract the value of sodium consumed to the amount of total sodium that we want to ingest as shown below:

  • 2300mg - 125mg = 175mg

According to the above, it can be inferred that after consuming the cereal bar at breakfast, we should consume an amount less than or equal to 2,175mg of sodium in the other meals of the day (lunch, dinner and snacks).

Learn more about sodium in: brainly.com/question/24010534

#SPJ1

8 0
1 year ago
Other questions:
  • The length of a Rectangle is 4 inches more than the with the perimeter is 4 inches find the length and the width
    14·1 answer
  • Which of the binomials below is a factor of this trinomial?
    7·2 answers
  • WILL MARK BRAINLIEST!! 50 POINTS!! SHOW ALL WORK!!
    8·1 answer
  • <img src="https://tex.z-dn.net/?f=solve%20for%20%22m%22%20t%3D%5Cfrac%7Bms%7D%7Bm%2Bn%7D" id="TexFormula1" title="solve for &quo
    6·1 answer
  • X 6.4.5-T
    12·1 answer
  • What is two and two-thirds subtracted by two and one-third
    9·1 answer
  • 10 + 2 - 3 = 3(2 + 2)
    6·1 answer
  • HELP HELP HELP HELP HELP HELP
    14·1 answer
  • Find an
    8·1 answer
  • Forty four grams are equivalent to how many ounces to the nearest hundredth?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!