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Mathematics 15 Online
OpenStudy (anonymous):

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hartnn (hartnn):

weight a is half the weight of the sum of weights b and c so a= 1/2 (b+c) 2a-b-c=0 ---> (1) got this ? can u form an equation using weight b is the sum of weights a and c

hartnn (hartnn):

a is half the weight of the sum of weights b and c 'half' = '1/2' 'sum' =' + ' 'is' = '=' so a= 1/2 (b+c) now ?

hartnn (hartnn):

all 1 ? how ? u just got 1 equation from 1 condition now make other 2 equations from other 2 conditions

hartnn (hartnn):

b is the sum of weights a and c b= a+c got this ?

hartnn (hartnn):

equation for this? half of the sum of weights a and b is three times weight c.

hartnn (hartnn):

yes, so a+b = 6c

hartnn (hartnn):

now u have 3 equations . and 3 unknowns....can u solve it? try it.

hartnn (hartnn):

2a-b-c=0 b-a-c=0 a+b-6c=0 since all the right sides are 0, hence the solution for a,b,c = 0,0,0

hartnn (hartnn):

means there cannot be weights which satisfy the given solution

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