We can answer this by replacing the given values of x and checking if the inequality is met, like this:
x + 3 < 10
• For x = 20
20 + 3 < 10
23 < 10
23 is not less than 10, then x = 20 is not a solution to the inequality.
• For x = -10
-10 + 3 < 10
-7 < 10
-7 is less than 10, then x = -10 is a solution to the inequality.
• For x = -20
-20 + 3 < 10
-17 < 10
-17 is less than 10, then x = -20 is a solution to the inequality.
• For x = 7
x + 3 < 10
10 < 10
10 is not less than 10, then x = 7 is not a solution to the given inequality.