Question

Which equation has the solution x = 9? Select each correct answer. Responses 4 + 5x = 18 4 + 5, x, = 18 2x−3=15 2 x minus 3 equals 15 3x + 2 = 25 3, x, + 2 = 25 24−2x=13 24 minus 2 x equals 13 x3+7=8 x over 3 end fraction plus 7 equals 8 81x−3=6 81 over x end fraction minus 3 equals 6

Answer 1

Answer: 2x - 3 = 15 , 81/x - 3 = 6

Explanation:

Substitute 9 for x on each equation and see if the sides are equal to each other

4 + 5x = 18

4 + 45 = 18

49 = 18 ( false )

2x - 3 = 15

2(9) - 3 = 15

18 - 3 = 15

15 = 15

3x + 2 = 25

3(9) + 2 = 25

27 + 2 = 25

29 = 25 ( false )

24 - 2x = 13

24 - 2(9) = 13

24 - 18 = 13

6 = 13 ( false )

x/3 + 7 = 8

9/3 + 7 = 8

3 + 7 = 8

10 = 8 ( false )

81/x - 3 = 6

81/9 - 3 = 6

9 - 3 = 6

6 = 6

Hope this helps !