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How to solve (ax+2by) = -5 & (-3x+2by) = 7, in MAT Lab by symbolic math add ons?

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Jawed
Jawed 2023-5-23
评论： Anish Gupta 2023-5-23
Solve (ax+2by) = -5 & (-3x+2by) = 7, in MATLab by symbolic math add ons?

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Anish Gupta
Anish Gupta 2023-5-23
Ran in:
Hello,
As per my understanding, you want to symbolically solve two equations. However, it is not clear from your question, for which variable you want to solve the questions. So, I am assuming you want to solve for either 'x' and 'y', or 'a' and 'b'. Here is a code which shows how to do this:
syms x y a b
eqn=[a*x + 2*b*y==(-5),-3*x+2*b*y==7];
solve(eqn,[x,y])
ans = struct with fields:
x: -12/(a + 3) y: (7*a - 15)/(2*(3*b + a*b))
Here is the solution for variables 'a' and 'b'
solve(eqn,[a,b])
ans = struct with fields:
a: -(3*(x + 4))/x b: (3*x + 7)/(2*y)
I hope this resolves your query
  2 个评论
Jawed
Jawed 2023-5-23
Thank you very much for providing solution. I want this solution for variable 'x' and 'y'. Thanks again.
Anish Gupta
Anish Gupta 2023-5-23
Ran in:
The solution for 'x' and 'y' are the first three lines of the code
syms x y a b
eqn=[a*x + 2*b*y==(-5),-3*x+2*b*y==7];
solve(eqn,[x,y])
ans = struct with fields:
x: -12/(a + 3) y: (7*a - 15)/(2*(3*b + a*b))

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