Length:12 cm
Width: 7 cm
My work is shown in the picture. I hope this helps!
The correct answer is a I think is correct
Answer:
Step-by-step explanation:
it depends. if (for example) y=x2 then there are an infinite amount of answers. if there is an equation like: If (variable X)= (variable Y) + 5 and if X=5, what is Y? then there is only one answer. check an algebra book, it can give you a more detailed answer.