You can put this solution on YOUR website! let A be the largest number and let B be the smallest number.
you have two equations that need to be solved simultaneously.
they are:
A + B = 26
A = 5B - 4
in the first equation, replace A with 5B - 4 from the second equation to get 5B - 4 + B = 26
combine like terms to get 6B - 4 = 26
add 4 to both sides of the equation to get 6B = 30
solve for B to get B = 30/6 = 5.
A + B = 26 becomes A + 5 = 26
solve for A to get A = 21.
your solution is that the larger number is 21 and the smaller number is 5.