Question

Which equation has the solution x = 9?

Select each correct answer.
ㅁ 2x - 3 = 15
ㅁ 4+5x = 18
ㅁ x/3 7= 8
ㅁ 3x+2=25
ㅁ 24 - 2x = 13
ㅁ 81/x - 3 = 6

Answer 1

2x - 3=15
•Add three to both 3 itself, and 15 (both sides)
2x=18
•Divide two by 2 itself, and 18 (both sides)
2x/2 18/2
x=9
So, 2x - 3 = 15 has the solution of x = 9!

Answer 2

2x - 3 = 15

81/x - 3 = 6

Explanation:

We can try each option to see if the variable is equal to 9 or not:

2x - 3 = 15

• Add 3 to both sides.

2x = 18

• Divide both sides by 2.

x = 9

81/x - 3 = 6

• Add 3 to both sides.

81/x = 9

• Cross multiply equation.

9x = 81

• Divide both sides by 9 to isolate x.

x = 9