Try another version of this question Solve the following system of equations with the substitution method: `{(x + 2 y,=,-9),(y, = ,-2 x -3):}` Answer: `(x,y)=`
Get help: Box 1: Enter your answer as an n-tuple of numbers. Example: (2,5.5172)
Enter DNE for Does Not Exist `(1,-5)`