Find all real numbers x such that
18x - 9> 9 and 2x - 4 > -10
click on the correct answer.

18x - 9 > 9

18x > 9 + 9

18x > 18

x > 18/18

x > 1

2x - 4 > -10

2x > -10 + 4

2x > -6

x > -6/2

x > -3

Since x must be bigger than 1 and bigger than -3 we have to satisfy both, and if x > 1 its already bigger than -3

So, just let be x > 1

It's the second option

x = 3 ± √(5+y)