Question 1052089
Systems  of  equations  in  three  variables  HELP!!
a+b=3
-b+c=3
a+2c=10
<pre>
a + b     =   3 ------- eq (i)
  - b + c =   3 ------- eq (ii)
a     + 2c = 10 ------- eq (iii)
a + c = 6 ------- Adding eqs (ii) & (i) ------- eq (iv)
{{{highlight_green(c = 4)}}} ------ Subtracting eq (iv) from eq (iii)

- b + 4 = 3 ------- Substituting 4 for c in eq (ii)
- b = 3 - 4
- b = - 1
b = {{{(- 1)/(- 1)}}}, or {{{highlight_green(b = 1)}}}

a + 1 = 3 ------- Substituting 1 fro b in eq (i)
a = 3 - 1, or {{{highlight_green(a = 2)}}}
Again, you need to IGNORE JOGS/JOSG's solution, if it can be called that.