Final answer:
To solve for a variable, one must rearrange the equation to isolate that variable, often by utilizing basic algebraic operations or techniques. Specific methods depend on the exact form of the equation in question.
Step-by-step explanation:
To solve for <missing variable> in the given equations, we must first identify what the variable represents and which equation we are referring to. There seems to be a typo or missing parts in the question, which makes it unclear. However, generally, to solve for a variable, we rearrange the equation to isolate the variable on one side. This may involve performing operations such as addition, subtraction, multiplication, division, or applying algebraic techniques like factorization or using the distributive property.
For instance, if you have an equation like x/1 = 5A and want to solve for x, you would multiply both sides by 1 to get x = 5A. Similarly, in another situation if you have <variable> = -5/7, the variable is already isolated, and the solution is the numerical value given (-5/7).