Question 363155
Let x = the first number
    y = the second number

Equation 1
 x+y = 75    

Equation 2
 y = 2x-3

Substituting the value of y in Equation 2 to Equation 1

 x + (2x-3) = 75
        3x = 75 +3
        3x = 78
         x = 26
        y = 75-26
        y = 49

The numbers are 26 & 49