Question

Three less than two times a number is 55. What is the number ?

Answer 1

29
2x29=58-3 =55
3-2x (x=29) =55
29x2=58-3

Answer 2

2x-3=55
You solve the equation as follows: 
2x-3=55
    -3   -3
2x=52
/2    /2
x= 26
The number is 26