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Evgen [1.6K]
3 years ago
5

1:X = X:81 what number can replace X?

Mathematics
1 answer:
anygoal [31]3 years ago
7 0

Multiply 1/x = x/81 by 81x and you get

... 81 = x²

Taking the square root gives

... x = ±9

Either 9 or -9 can replace X to make the proportion statement true.

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