justinb0829
12.10.2020 •
Mathematics
?given ac=CD and bc=CD which could be used to prove abc=edc
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Ответ:
76
Step-by-step explanation:
Not sure what you mean by the second half, but I'll answer the first question. Since the number is two digits, you can represent it as 10x + y. If you reverse the digits, it becomes 10y + x. So, 11x + 11y = 143, and 9x - 9y = 9. Solving for x and y, you find x = 7 and y = 6.