Find the solution to the given equation if the replacement set is {6, 9,15,16}. 6 + 2x = 24 a) 6 b) 9 c) 15 d) 16

The answe is B. You have to do 2 times 9 and then you add 6 which equals 24

They gave you a set of numbers that you replace the variable x in the equation to see if it gives a correct answer so just do exactly that.

6 + 2x = 24
6 + 2(6) = 24
6 + 12 = 24
18 = 24      so incorrect. both sides are not equal to each other.

6 + 2x = 24
6 + 2(9) = 24
6 + 18 = 24
24 = 24       so correct. both sides are equal to each other.

6 + 2x = 24
6 + 2(15) = 24
6 + 30 = 24
36 = 24       so incorrect. both sides are not equal to each other.

6 + 2x = 24
6 + 2(16) = 24
6 + 32 = 24
38 = 24      so incorrect. both sides are not equal to each other.

so your answer is b) 9

hope this helps, God bless!