ttyron923
ttyron923 ttyron923
  • 04-01-2022
  • Mathematics
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devishri1977
devishri1977 devishri1977
  • 04-01-2022

Answer:

Step-by-step explanation:

1.  5x + 9 = 9 + 5x  

Ans: Infinitely many solutions.

2. -4z + 8 = -4z - 8

Add 4z to both sides

-4z + 4z + 8 = -4z + 4z - 8

 8 ≠ -8

Answer: No solution

3. z -3 = 3 -z

Answer: No solution

4) 3x + 7 = 7x +3

Subtract 3x from both sides

3x - 3x + 7 = 7x - 3x + 3

7 = 4x + 3

Subtract 3 from both sides

7 - 3 = 4x - 3

4 = 4x

Divide both sides by 4

4/4 = 4x/4

1 = x

Answer: One solution

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