Question

Which of the following equations have no solutions? Choose all answers that apply:
(Choice A) A -40x+40=20x+20
(Choice B) B 20x+40=40x+20
(Choice C) C -20x+40=-20x+20
(Choice D) D 40x+40=40x+20

Answer 1

A

$- 40x + 40 = 20x + 20 \\ - 60x = - 20 \\ x = \frac{1}{3}$

This equation has a solution

B

$20x + 40 = 40x + 20 \\ - 20x = - 20 \\ x = 1$

This equation has a solution

C

$- 20x + 40 = - 20x + 20 \\ 0x = - 20$

This equation has no solution

D

$40x + 40 = 40x + 20 \\ 0x = - 20$

This equation has no solution

Answer: C, D

Answer 2

answer choice a and b are incorrect . C and D are correct