No solution, All Real Numbers, 1 solution, 2 Solutions

x + 7 = x + 6

• No solution

• All Real Numbers

• One solution of x = 1

• Two solutions of x = 1 or -1

7x = 6x

• No solution

• All Real Numbers

• One solution of x = 0

6x = 6x

• No solution

• All Real Numbers

• One solution of x = 0

19 + x = -1 + x

• No solution

• All Real Numbers

• One solution of x = 0

19 + 2x = 18+ 1 + x +x

• No solution

• All Real Numbers

• One solution of x = 0

6 - 2x = 2x - 6

• No solution

• All Real Numbers

• One solution of x = 3

x²= 16

• No solution

• All Real Numbers

• One solution of x = 4

• Two solutions of x = 4 or -4