You would need to divide by -1/2.
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Twice the rational number 5/2 = 5From this, you need to subtract 4 3/5 to get 2/5.
if you have the area. divide the area by the length to get the width. If you have the perimeter subtract the length twice and divide the number you have by two. If it is a square the width is the same as the length.
-5n - 8 < 2(-n) - 83-5n - 8 < -2n - 83 (add 5n and 83 to both sides)-5n + 5n + 83 - 8 < -2n + 5n + 83 - 8375 < 3n (divide by 3 to both sides)25 < n orn > 25
2.25
Twice a number would be written as 2x.