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
sdas [7]
3 years ago
13

-x + 1 = x + 21solve for xI need this asap​

Mathematics
2 answers:
bezimeni [28]3 years ago
8 0

Answer:

x = -10

Step-by-step explanation:

-x + 1 = x + 21

(given)

__________

-x + 1 = x + 21

+x +x

(addition property of equality)

(add the x term on both sides to cancel out -x)

__________

1 = 2x + 21

-21 -21

(subtraction property of equality)

(subtract by 21 on both sides to get rid of the constant term on the x side)

________

-20 = 2x

÷2 ÷2

(division property of equality)

(divide to get rid of the coefficient of 2 in the x term)

_______

-10 = x

(symmetric property of equality)

(switch both sides so that x is on the left)

_______

x = -10

________________________________

Proof by substitution:

x = -10 because

x = -10 → -x + 1 = x + 21 → -(x) + 1 = (x) + 21 → -(-10) + 1 = (-10) + 21 → 10 + 1 = 21 - 10 →

11 = 11

levacccp [35]2 years ago
3 0

Answer:

x=10

Step-by-step explanation:

Put both of the x on one side, and the numbers on the other side (this breaks down the equation).

This is make it easier for you to add/substract/divide/multiply.

You might be interested in
The rental fee for space at a flea market is $200 per month base rate
shepuryov [24]

Answer:

can you take a picture or is it just words so if theres like a number line or something

Step-by-step explanation:

6 0
3 years ago
What is the area of a triangle with the coordinates (-4,14) (10,0) (-14,-10)
allsm [11]
You can use Heron Formula in the calculator to output the result, but i still show you the steps on paper thro

lengths of the 3 lines:  \sqrt{392} ,  \sqrt{676} ,  \sqrt{676} 

s= (\sqrt{392} + \sqrt{676} + \sqrt{676})/2=35.89949494

area= \sqrt{s(s- \sqrt{392} )(s- \sqrt{676})^2 } =238
3 0
3 years ago
A service station will be built in the highway, and a road will connect it with cray. How long will the new road be?
abruzzese [7]

Answer: 24 mi

Step-by-step explanation:

Let the points A, B, C and S represent Alba, Blare, Cray and Service station respectively,

Then According to the question,

We have to find out the line segment CS = x = ?

Now, In the triangles ACB and CSB,

\angle ACB\cong \angle CSB     ( Right angles )

\angle ABC\cong \angle CBS      ( Reflexive angles )

Thus, by AA similarity postulate,

\triangle ACB\sim\triangle CSB

By the property of similar triangles,

\frac{AB}{CB}=\frac{AC}{CS}

\implies \frac{50}{30}=\frac{40}{x}

\implies 50x=30\times 40

\implies 50x = 1200

\implies x =24

Thus, the length of the new road = 24 miles


7 0
3 years ago
Carlita planted 4 flowers in 6 minutes. About how many flowers can Carlita plant in 36 minutes?
sattari [20]

Answer:

24

Step-by-step explanation:

\frac{4}{6} =\frac{x}{36}

\frac{4}{6} *\frac{6}{6} =\frac{24}{36}

x = 24

Hope this helps and pls do mark me brainliest if you can:)

6 0
2 years ago
Read 2 more answers
Type the correct answer in the box. The area of the figure is _______ square units. 2 units 8 units. 6 units​
Andrei [34K]

The area of the figure is 26 square units. There is 6 of a 2 which adds up 12 and there is one 8 and adding it with 12 would be 20. The last number was a 6 so you add 20 with 6 which adds up of 26 square units. So the area Of the firgure is 26 square units.

3 0
3 years ago
Read 2 more answers
Other questions:
  • 60 x 4 = tens x4 tens=
    11·2 answers
  • Which of the following is the best use for the sign chart when graphing rational functions
    15·2 answers
  • What is the probability of getting a 70 on a <br> a. True <br> b. False test were you guess?
    12·1 answer
  • Please help me it’s really important
    7·1 answer
  • James purchases a property for $150,000 in 2015. In the first year of ownership the capital appreciation of the property (how mu
    7·1 answer
  • The population of a town is 132,00. The population increases 4% a year. What will be the population in 8 years?
    15·1 answer
  • The vertex of a parabola is (3,-2) and another point on the parabola is (2,3) find the equation of the parabola in vertex form
    6·1 answer
  • Sa
    14·1 answer
  • What polynomial will produce the sum 7x^2-x+3 when added to 3x^2-5x+4
    6·1 answer
  • Which table of ordered pairs represents a proportional relationship?
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!