Question 313688
Is it "6 times heavier", or six times as heavy?
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7x = weight of the giraffe 
x/4 = weight of the zebra 

x + 7x + x/4=450 

Multiply thru by 4
4x+ 28x+ 1x= 1800
33x=1800
x =~ 54.54 lbs (weight of lion)
7x =~ 381.82 lbs (giraffe)
x/4 =~ 13.36 lbs (zebra)

Totals 450 pounds