Math
posted by Odessa .
The perimeter of a recatangle is twice the sum of its length and its width. The perimeter is 16 meters and its length is 2 meters more than twice its width.What is the length?

w = width
(2+2w) = length
perimeter = 2[w+(2+2w)] =16
w+2+2w = 8
3 w = 6 etc 
16 = 2L + 2W)
L = 2W + 2.
Solve the two equations for L and W.
By substitution, you can see that
16 = 2L + L  2 = L  2 
The ratio of men to women in a certain factory is 3:4. There are 210 men. How many workers are there?

Answer is 280
x = (4/3) * 210 = 280 
M/W = 3/4
M = 210
W = 280
M + W = ?
The number of women is 280, but the total number of workers is something else.
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