Five more than twice a number is 17.

Let the number be x.

Twice a number means 2x

then,

five more than twice a number means 2x+5

As per the given condition:

Subtract 5 from both sides of an equation;

2x+5-5=17-5

Simplify:

2x = 12

Divide by 2 from both sides of an equation;

Simplify:

x =6

Therefore, the value of x is 6