how can i solve these linear equation? I am just installed it and having difficulties using matlab

syms a b c x y z

>> eqn1 = [a + b + c == 2200]

>> eqn2 = [ 0.06*a + 0.08*b + 0.09*c == 178]

>> eqn3 = [c == 3*x]

solve(eqn2, a ,b ,c)

ans = struct with fields:

a: [1×1 sym]

b: [1×1 sym]

c: [1×1 sym]

Answer 1

[KSSV]

s = solve(eqn2, a ,b ,c) ;
a = double(s.a)
b = double(s.b) 
c = dpuble(s.c)

s = double(s)

[Levi]

a =2.9667e+03

b = 0

c = 0

Error using double

Conversion to double from struct is not possible

I get this one while using the one that you give. I am a beginner, so i wasnt sure why i get this one but thanks for the effort.

[KSSV]

syms a b c x y z
eqn1 = a + b + c == 2200 ; 
eqn2 = 0.06*a + 0.08*b + 0.09*c == 178 ; 
eqn3 = c == 3 ;
eqn = [eqn1,eqn2,eqn3] 
s = solve(eqn, a ,b ,c) 
a = double(s.a)
b = double(s.b) 
c = dpuble(s.c)

[Levi]

thanks a lot sir. I appreciate it