Hi,
Let x represent the number of deluxe staterooms on the Pacific Paradise.
Then (x + 13)staterooms will be on The Caribbean Paradise and (4x-23) on the Mediterranean Paradise
total number of deluxe staterooms for three ships is 752.
x + (x+13) + (4x-23) = 752
solve for x
6x = 762
x = 127, the number of deluxe staterooms on the Pacific Paradise.
Will leave it up to you to finish and check your answers.
The Caribbean Paradise?
Mediterranean Paradise?
Total is 752