Please help me answer this

Hello!

3(x + 3) = 18

⇒ Step 1 - Multiply everything in the brackets by 3:

3x + 9 = 18

⇒ Step 2 - Subtract 9 from both sides of the equation:

3x + 9 = 18

     - 9    - 9

3x = 18

⇒ Step 3 - Divide both sides of the equation by 3.

x = 6

x = 3

Step-by-step explanation:

1. Distribute.

2. Subtract 9 from BOTH sides.

3. Simplify.

4. Divide BOTH sides of the equation by the same term.

5. Simplify.

Therefore, your answer is X = 3

54 kilometers per hour

step-by-step explanation:

according to rules:

1 km = 1000 meter

which means that 1 meter = 1/1000 km

1 hour = 3600 second [ as 1 hour = 60 min = 60 *60 seconds ]

which means that 1 second = 1/3600 hour

therefore, 1 kilometer/hour =

thus to convert 15 meter per second to kilometer per hour, we multiply 15 to 3.6 kilometer/hour.

15 meter/second=   which is the required answer.