When 5 is added to 2 times a number the result is 45

I'm going to assume that you want us to figure out what the number is for you.You said:  2x + 5 = 45Subtract 5 from each side:2x = 40Divide each side by 2 :x = 20

the answer is 20 which I calculated from the equation of 2x+5=45