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Solve the following system of equations with the substitution method:
`{(x, =, -5 y -3),(-3 x -15 y,=,9):}`
Answer: ( , )
Enter your answers as integers or as reduced fractions in the form A/B. If there is no solution, type "DNE" in each blank. If there are an infinite number of solutions, specify their form in the blanks in terms of y.
`{(x, =, -5 y -3),(-3 x -15 y,=,9):}`
Answer: ( , )
Enter your answers as integers or as reduced fractions in the form A/B. If there is no solution, type "DNE" in each blank. If there are an infinite number of solutions, specify their form in the blanks in terms of y.
`-5 y -3`
`y`