Twice the difference of a number and 8 equals 5

Step-by-step explanation:

Let the number be x

So 2-x+8=5

Collect like terms:NB:when a figure moves over the = sign it changes its sign. If it was + it becomes - and if it was - it changes to +

-x=5-2-8

-x=-5

Divide both sides by -

X=5