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]
2 years ago
13

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

Mathematics
2 answers:
bezimeni [28]2 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
use the guide to construct a two column proof proving △aec≅△deb, given that ca is parallel to db and e is the midpoint of ad. gi
MrMuchimi

By using the AAA congruence property of Triangles, △aec≅△deb is proved

It is given two triangles, Δaec and Δdeb, where e is the common point known as the midpoint of ad

Also, it is given that,

ca ║db

We need to prove that, △aec≅△deb

Then we'll use AAA congruence property of Triangles to prove the situation

As ca ║db

then, ∠cae = ∠ebd  (Alternate angles)

∠ace = ∠edb (Alternate angles)

and ∠aec = ∠deb (common angles)

Thus, by AAA congruence property, △aec≅△deb

Hence, proved

To learn more about, congruence property, here

brainly.com/question/2039214

#SPJ4

5 0
1 year ago
On a quiz, students were awarded a certain number of points for a correct answer and penalized a certain number of points for an
SVETLANKA909090 [29]
Given that the score of the student on the quiz was 25c - 10(15 - c)

It can be seen that the first term of expression for her score (i.e. 25c) shows that 25 marks were awarded to each correct answer.

The second term of the expression (i.e. 10(15 - c)) represent that 10 marks were deducted from each wrong answer.

Thus, the number of wrong answers is 15 - c.

The sum of the correct answers and the wrong answers gives the total number of questions in the quiz.

Thus, the total number of questions in the quiz is given by 15 - c + c = 15.

Therefore, there are 15 questions in the quiz.
8 0
2 years ago
The selling price for a classic speedboat is $16,000, which is $500 more than two times its original price. What was the origina
lbvjy [14]
$7,750 is the answer :)
3 0
3 years ago
A group of 50 people are goin to run a race. The top 3 runners earn gold, silver, and bronze medals
UNO [17]
I don’t know this one
8 0
2 years ago
What Region does the Solution for Y
Vladimir [108]

Answer:

you need to provide a map or a question to be answered

Step-by-step explanation:

7 0
2 years ago
Other questions:
  • Which parent relation would best represent the side of the vase outlined by the curve in the red?
    9·2 answers
  • 13,501 round up to the nearest ten thousand
    14·1 answer
  • Frank jogs in a circular garden every day. The ground measures 5 feet from the center to the inner circle and an extra 3 feet fr
    12·1 answer
  • 15 POINTS to solve this CONSTRUCTION.
    12·1 answer
  • |2.5–y|=3 please help asap
    7·1 answer
  • ??????????????????????
    13·1 answer
  • Need helppppppppppppppppp
    13·2 answers
  • Simply by adding like terms: -7x^2*y*z + 3y*z^2 - z*x^2*y - 4y
    7·1 answer
  • jane loves animals. She has an equal number of beetles, birds and spiders as pets. Apart from human legs, there is a total of 27
    12·1 answer
  • Question (e) only please show working as well appreciate it
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!