Try another version of this question Solve the following system of equations with the substitution method: `{(x + 2 y,=,20),(y, = ,-5 x + 28):}` 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 `(4,8)`