Can someone help me with 25

You could just plug in the values into "x" to see which one works out in the inequality:

x = 16

x + 9 < 7     Substitute/plug in 16 for x

16 + 9 < 7

25 < 7       This is not a solution because 25 is not less than 7

x = -6

x + 9 < 7

-6 + 9 < 7

3 < 7       This is a solution because 3 is less than 7

x = 4

x + 9 < 7

4 + 9 < 7

13 < 7      This is not a solution because 13 is not less than 7

x = -2

x + 9 < 7

-2 + 9 < 7

7 < 7      This is not a solution because 7 can not be greater/less than itself

You could have also done this:

x + 9 < 7        Isolate/get the variable "x" by itself in the inequality, subtract 9 on both side

x + 9 - 9 < 7 - 9

x < -2  

[x is any value less than -2, so any number less than -2 would be a solution]

2

step-by-step explanation:

vvvvv