Respuesta :
Answer:
Step-by-step explanation:
Problem A
3x - 5 + x = 2x - 3 + 2 + 2x
Bring like terms close to each other so they can be combined on both the left and right sides.
3x + x - 5 = 2x+ 2x - 3 + 2 Combine like terms
4x - 5 = 4x - 1 Stop. Nothing more is going to work and give you anything but No Solution. You will wind up with - 5 = - 1 which is a contradiction.
Number of Solutions: None
Classification: Contradiction
Problem B
4x + 5 - 6x = -x + 3 - x + 2 Bring like terms close to each other so they can be combined on both the left and right sides.
4x - 6x + 5 = -x - x + 3 + 2
-2x + 5 = - 2x + 5 Stop!!!
This will give an infinite number of solutions. Suppose x = 200. Then you will get
-2*200 + 5 = -2 * 200 + 5
- 400 + 5 = - 400 + 5
- 395 = - 395 No matter what you use, the same thing will happen. The equation is an identity. Identities are really useful when you are checking equations. The left side should always come out to be the right side.
Number of Solutions: Infinite
Classication: Identity.
Problem C
8x + 2 - 6 = 4x +8 +3x Bring like terms close to each other so they can be combined on both the left and right sides.
8x + 2 - 6 = 4x + 3x + 8 Combine like terms.
8x - 4 = 7x + 8 Subtract 7x from both sides
8x - 7x - 4 = 7x - 7x + 8 Combine like terms
x - 4 = 8 Add 4 to both sides
x = 4 + 8
x = 12
Solutions: 1
Classification: Neither. But it is actually classified as a conditional equation if it has 1 legitimate solution.
Note: I really hope I have not wasted your points.