7,301,985 and 7,338 what is the difference of the digit 7 in each number

The difference in 7,301,985 is that the 7 is in the Millions place. And the difference in 7,338 is that that 7 is in the thousands place.

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Set two of the sides equal to one another:

8x - 20 = 4x + 18
4x = 38
x = 38/4
x = 19/2 or 9.5

now that we know x, plug it back in to find the side lengths:

4(9.5)+ 18 = 38 + 18 = 56

that is your side length

since it’s equilateral, the perimeter is equal to
56 x 3

final 168

hope this helps:)