Posted by Kara on Saturday, October 20, 2012 at 2:50pm.
2a + 7b + 17c = 31 How do you work out what a,b and c are?? any help would be appriciated

math  Steve, Saturday, October 20, 2012 at 3:11pm
without more info, there's no way to assign a specific value to any of them.
Just pick any value for c, cay c=1
then you have
2a+7b +17 = 31
2a+7b=14
Now, you can pick a=7, and then b=0
or you can pick b=2 and then a=0
or, you can pick a = 7, and then b=4
and so on. In general, if you have three variables, you will need three separate equations which must all be satisfied to determine unique values for the variables.

math  Kara, Saturday, October 20, 2012 at 3:15pm
Thanks for the pointer Steve! I'll try that :)
Answer This Question
Related Questions
 English  Can anyone tell me where in King Lear does GLoucester find out that ...
 Physics  waves propagate down a 25gram string at 35 m/s. If the string has a ...
 Math  C^2+17c+16
 Math  Can someone please help me figure out the mean, standard deviation, raw ...
 Math  How would you solve a problem like this with logarithims? I tried to ...
 Geography  A Day Without Farming? This is for Geography. I have to hand in one ...
 Math  I don't understand this it says If the average of 6 numbers was 58, what ...
 Algebra  Quick Question, when would an inequality like this work: x^2  4x >...
 Algebra  Quick Question, when would an inequality like this work: x^2  4x >...
 Math  Is there a case when you might prefer algebraically over graphically ...
More Related Questions