Question

Find the value of x , if 3x=9.

1) 21
2) 39
3) 45
4) 126

Answer 1

To find the value of x in the equation 3x=9, divide both sides by 3, which isolates x and gives x = 3 as the solution. Therefore, the value of x is 3.

Step-by-step explanation:

To find the value of x when given the equation 3x=9, you would perform the following steps:

1. Identify the mathematical operation being used. Since 3 is being multiplied by x, you need to 'undo' this operation to solve for x.
2. Divide both sides of the equation by 3 to isolate x on one side. This is because division is the inverse operation of multiplication.
3. Upon dividing both sides by 3, the equation becomes x = 9 / 3.
4. Calculate the result of 9 divided by 3, which equals 3.
5. Therefore, the value of x is 3.