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Rearrange symbolic variables in equation

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jun wei
jun wei 2022-12-20
评论： jun wei 2022-12-20
Suppose i have an equation a=b*(c-3) and i want to find a/b which is equal to (c-3). How do i code it. P.S I have tried the solve function
eqn = a == b*(c-3);
S = solve(eqn, a/b)
but the result is
S =
struct with fields:
b: [0×1 sym]
c: [0×1 sym]

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采纳的回答

Walter Roberson
Walter Roberson 2022-12-20
syms aoverb
S = solve(subs(eqn, a, aoverb*b), aoverb)

更多回答（1 个）

VBBV
VBBV 2022-12-20
编辑：VBBV 2022-12-20
syms a b c ;
eqn = a/b == (c-3);
S = solve(eqn,[ a,b,c])
  3 个评论
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VBBV
VBBV 2022-12-20
Ran in:
syms a b c ;
eqn = a/b == (c-3);
S = solve(eqn,[a,b])
S = struct with fields:
a: c - 3 b: 1
lhs(eqn) == S.a % do you mean like this ?
ans = 
jun wei
jun wei 2022-12-20
uhmm not exactly. For instant if a much complicated equation say a+y^2+3x=b*(2x+c) etc and i want to find a/b in terms of those symbolic variables.

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