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
Airida [17]
3 years ago
10

What is the value of x when x + 7 = 21?

Mathematics
2 answers:
sergij07 [2.7K]3 years ago
6 0

Answer:14

Step-by-step explanation:

x + 7 = 21

group like terms

x = 21 - 7

When positive cross = sign it turns negative

x = 14

Yuki888 [10]3 years ago
4 0
X + 7 = 21

- 7 - 7

x = 14
You might be interested in
Solve this system of equations by graphing . first graph the equations then type the solution .
Lena [83]

9514 1404 393

Answer:

  (x, y) = (5, -4)

Step-by-step explanation:

The Desmos graphing calculator is a handy tool for solving questions like this one. It tells you the solution is ...

  (x, y) = (5, -4)

5 0
3 years ago
What is the answer to number 7 and 8
saveliy_v [14]

Answer:

Good, Good, Good, Good, GOOOOOOOOOOOOOOOOOOOO000D. It's E btw I think I don't know

Step-by-step explanation:

3 0
3 years ago
Alan solved the proportion StartFraction x over 200 EndFraction = StartFraction 8 over 25 EndFraction as shown. StartFraction x
bulgar [2K]

Answer:

Step-by-step explanation:

The proportion that Alan solved was

x/200 = 8/25

His working as shown was

(8)(x) = (25) (200)

8x = 5000

He divided both sides of the equation by 8. It became

8x/8 = 5000/8

x = 625

The correct steps are

25x = 200 × 8 = 1600

Dividing both sides of the equation by 25, it becomes

x = 1600/25

x = 64

Alan's error were:

1) He got the wrong product when he multiplied 25 by 200.

2)He got the wrong quotient when he divided 5,000 by 8.

7 0
3 years ago
Read 2 more answers
Which expression has a pair of like terms?
KATRIN_1 [288]

Answer: x-3+x+3y

Step-by-step explanation:

Because there is 2 x’s

7 0
4 years ago
Kendra bought a piece of fabric that was 14 feet long.Lisa bought a piece of that was 3 yards long.Kendra wanted to cut her fabr
marusya05 [52]

Answer:

6

Step-by-step explanation:

8 0
3 years ago
Other questions:
  • Bill has to figure out the area of a square yard he knows that one side it of his yard is equal to the length of his garage the
    10·2 answers
  • If there were 35,000 fatal traffic accidents, how many would be expected to involve drivers in the 55-64 age group?
    15·1 answer
  • 1. In an AP, the ratio of the 2nd term to the 7th term is 1/3. If the 5th term is
    8·1 answer
  • 7(5f-3n)-8 use n=3 and f=7​
    6·2 answers
  • X^2 + y^2 = 25 <br> x^2 + y^2 = 19
    11·1 answer
  • Wayne has a recipe on an index card with a length of 3 inches and a width of 5 inches. He wants to enlarge to 15 inches long. Ho
    14·1 answer
  • Solve for x.<br> -9x + 2 &gt; 18 OR 13r + 15 &lt; -4
    8·1 answer
  • Yah vertical stick of length 6M Casts a shadow 400 cm long on the ground at the same time a tower Casts a shadow 28 metre long u
    12·2 answers
  • Write an equation in Slope intercept form of the line that passes through the given points (-3,4) (1,4)
    11·2 answers
  • Help asap, The graph compares the total cost of buying movie tickets for members and nonmembers of a movie club
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!