Symbolic: Rearrange so one side is zero

Question

I have the equation:

syms x y
A= 5*x - 100*y == x

I want it to be rearranged in the form:

A = 0 == 4*x-100y

How can I do it?

Answer 1

Use children() to split A in two parts:

• Left Hand Side: LHS
• Right Hand Side: RHS

Then compute A = 0 == LHS - RHS

The code is as follows

syms x y

A = 5*x - 100*y == x;

A_as_Array = children(A);

A_Left_Hand_Side = A_as_Array(1) ;

A_Right_Hand_Side = A_as_Array(2); 

A = 0 == A_Left_Hand_Side - A_Right_Hand_Side; 

% A = 0 == 4*x - 100*y