i have 3 equations and i have to solve for a,b,c

the equations:

a=4.3-0.056b-51.2c

b=20.76-51.2a-4130.1c

c=0.352-0.055a-0.009b

i got

a=3.47

b=42.3

c=-0.003

it would be great if someone could just double check my work. thanks

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- Oct 17th 2007, 03:47 PMixican someone check my math please?
i have 3 equations and i have to solve for a,b,c

the equations:

a=4.3-0.056b-51.2c

b=20.76-51.2a-4130.1c

c=0.352-0.055a-0.009b

i got

a=3.47

b=42.3

c=-0.003

it would be great if someone could just double check my work. thanks - Oct 17th 2007, 04:22 PMtopsquark
- Oct 17th 2007, 04:45 PMixi
there's no required method. we're just suppose to solve for the letters.

i took the equation of b and plugged it into a

and got a=3.92+15.11c

then i plugged that equation into c

and got b=15.2-1034.4c

then plugged that one onto equation b and got b=6.9-3606.2c

then using the two b equations:

b=15.2-1034.4c

b=6.9-3606.2c

got c= -0.003

since a=3.92+15.11c

and c= -0.003

a= 3.47

then b=42.3

i guess i made a calculation mistake somewhere. i'll go back and redo it.