Answer:
B 2x - 31 = -2x - 31 have exactly one solution
Explanation:
Which of the following equations have exactly one solution?
Choose all answers that apply:
A 2x - 31 = 2x - 31
B 2x - 31 = -2x - 31
C 2x + 31 = 2x - 31
D 2x - 2 = 2x - 31
A. 2x - 31 = 2x - 31
2x-31=2x-31
Collect like terms
2x-2x= -31+31
0=0
Infinite number of solutions
B 2x - 31 = -2x - 31
2x - 31 = -2x - 31
Collect like terms
2x+2x=-31+31
4x=0
x=0
One solution
C 2x + 31 = 2x - 31
2x + 31 = 2x - 31
Collect like terms
2x-2x= -31-31
0= -62
No solution
D 2x - 2 = 2x - 31
2x - 2 = 2x - 31
Collect like terms
2x-2x= -31+2
0= -29
No solution