CrossProductEquation

This class was created to manage specifically Equations like x / a = b / d, or a / x = b / d etc.
CrossProductEquation.solve_next_step() just creates the next step Equation, using Table.cross_product().

Possible args for __init__():

• CrossProductEquation
• (Quotient, Quotient)
• (num1, num2, deno1, deno2)

where Quotients and num* and deno* are Calculables.
Only one literal object is expected to be among the Quotients, num* and deno*.

Fields:

• variable_obj: (read-only) access to the object containing the variable (it can be cos(alpha), so a Function and not only a literal Item)
• variable_position: (read-only) indicates the position of the variable

Variable positions are coded this way:

0: x a     1: a x     2: a b    3: a b
   b c        b c        c x       x c

Debugging info: no dbg_str() method, so far

Check CrossProductEquation's complete doc

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