Use the substitution method to determine whether the system of equations has one solution, no solution, or infinitely many solutions. 2x-y=10 x = y + 5

We have the equations:
  2x-y = 10, x = y + 5
 To solve the system we substitute x = y + 5 in the first equation and it remains:
 2 (y + 5) - y = 10
 2y +10 -y = 10.
 y = 0
 Then we substitute y = 0 in any of the two equations to find x
 Finally we have left that x = 5

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