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
oksian1 [2.3K]
3 years ago
12

Which equation is an identity?​

Mathematics
2 answers:
kirza4 [7]3 years ago
6 0

Answer:

Option (3).

Step-by-step explanation:

Option (1).

3(x - 1) = x + 2(x + 1) + 1

3x - 3 = x + 2x + 2 + 1

3x - 3 = 3x + 3 [Not True]

Therefore, this equation is not an identity.

Option (2).

x - 4(x + 1) = -3(x + 1) + 1

x - 4x - 4 = -3x - 3 + 1

-3x - 4 = -3x - 2 [Not true]

Therefore, this equation is not an identity.

Option (3).

2x + 3 = \frac{1}{2}(4x + 2) + 2

2x + 3 = 2x + 1 + 2

2x + 3 = 2x + 3 [True]

Therefore, this equation is an identity.

Option (4).

\frac{1}{2}(6x-3)=3(x+1)-x-2

3x - 1.5 = 3x + 3 - x - 2

3x - 1.5 = 2x + 1 [Not true]

Therefore, this equation is not an identity.

iris [78.8K]3 years ago
5 0

Answer:

Option (3).

Step-by-step explanation:

You might be interested in
The stack on the left is made up of 15 pennies, and the stack on the right is also made up of 15 pennies. If the volume of the s
Nimfa-mama [501]
It would be 390 mm3 because theyre the same thing

5 0
3 years ago
Read 2 more answers
If 2% of a number equals 9, find 4% of that number.
s2008m [1.1K]

Answer:

18

Step-by-step explanation:

The number you are getting the percent from is 450

4 0
2 years ago
The sum of four consecutive integers if the first integers is x
vlada-n [284]
X + (x + 1) + (x + 2) + (x + 3)
4x + 6
3 0
3 years ago
Find the value of x!
Fiesta28 [93]

Answer:

x=12

Step-by-step explanation:

10x-20+6x+8=180

16x-12=180

16x=192

x=12

3 0
2 years ago
If Mary road her bike for 4 hours how far would Mary have road her bike
xenn [34]
How fast was she going?
8 0
3 years ago
Other questions:
  • What is 2(9x+3)+5x=48+2x
    14·1 answer
  • What is the algebraic expression for "the difference between seven times a number and three times that number"? 7 - 3 x 7 x - 3
    15·2 answers
  • What is the value of x?
    7·2 answers
  • PLEASEEEE FACTOR THIS
    7·1 answer
  • Evaluate. 5/8−(14)2= ________
    15·1 answer
  • A used bookstore will trade 2 of its books for 3 of yours if Val brings in 18 books to trade how many books can she get from the
    12·1 answer
  • A car is 180 inches long.A truck is 75% longer than the car.<br> How long is the truck?
    15·1 answer
  • Can someone help me and tell me where it’s located at I will mark u brilliant
    7·1 answer
  • Please tell me the answer
    11·1 answer
  • Solve the system using substitution 4x+3y=23 x-5=0
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!