Can someone help me solve this question and thanks

Find the solution of this system of equation -7x+y=-20 9x-3y=36

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 rt is greater than ba, which statement must be true ?