Four-digit 55481

Find all four-digit abcd numbers to which: abcd = 20. ab + 16. cd, where ab and cd are double digits numbers from digits a, b, c, and d.

Correct answer:

x1 =  1264
x2 =  1580
x3 =  1896

Step-by-step explanation:

1264=20 12+16 64 1580=20 15+16 80 1896=20 18+16 96  x1=1264

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