X-5

To solve this question,

Lets assume:

The number itself is denoted by the variable

X

So,

Difference with five would mean subtracting this number with five. Hence:

X-5

Twice the difference of a number and five means multiplying the entire term by 2. That is:

2(X-5)

Simplifying:

2(X-5)=0

2X-10=0

2X=10

X=10/2

X=5

Hence the number is 5

Now putting it in the equation:

2(5-5)=0

2(0)=0

0=0

Lets assume:

The number itself is denoted by the variable

X

So,

Difference with five would mean subtracting this number with five. Hence:

X-5

Twice the difference of a number and five means multiplying the entire term by 2. That is:

2(X-5)

Simplifying:

2(X-5)=0

2X-10=0

2X=10

X=10/2

X=5

Hence the number is 5

Now putting it in the equation:

2(5-5)=0

2(0)=0

0=0