12. When Raphael solved the system below by using the method of elimination, he changed the second equation to-88-2y = -2. What property justifies this manipulation?
8x + 3y = 7
4x + y = 1

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Sample response: if the graph passes the horizontaline test, then the function is one to one. functions that are one to one have inverses that a therefore, the inverse is a hinction compare your response to the sample response above. what did you include in your explanation? a reference to the horizontal-line test d a statement that the function is one-to-one the conclusion that the inverse is a function done

If a is a nonzero real number then the reciprocal of a is