Lets solve each option:
9/x - 1 = 4
9 / x = 3
x = 27
Nope!
3x + 1 = 9
3x = 8
x = 8/3
2x + 4 = 10
2x = 6
x = 3
Yes!
x/3 + 5 = 6
x/3 = 1
9 - 3x = 0
-3x = -9
5x - 7 = 1
5x = 8
x = 8/5
This means that the correct answers are:
I hope this helps! :)
