Twice the difference of a number and 9 equals 8

The unknown number will be "x = 13".

Let,

According to the question,

The equation will be:

→      

By solving the bracket, we get

→        

By adding "18" both sides, we get

→

→                

Thus the answer above is right.

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13 is the number.

Step-by-step explanation:

Given:

Twice the difference of a number and 9 equals 8.

Let the unknown number be 'x'.

Therefore, as per question:

The difference of 'x' and 9 =

Twice the difference means 2 times the difference. So, we multiply 2 to the difference. Therefore,

Now, the above expression is equal to 8. So, we equate the above expression to 8. This gives,

Solving for 'x', we get:

Using distributive property of addition and distributing 2 inside the bracket. This gives,

Therefore, the unknown number is 13.

Now, we can verify our answer.

Therefore, the answer is correct.

x= 3^y

step-by-step explanation: