2x-y=10
Y=-x-1
Solve the system of equations

 (9,8)

Step-by-step explanation:

  let 2x - y = 10  be [a]   &   y = x − 1 be [b]

First, lets substitute [b] into [a] and solve for x

  2x - ( x - 1) = 10

         2x - x  = 10 - 1

                  x = 9

Now, since x = 9, we can substitute for x in [b]

      ⇒  y = 9 - 1

            y = 8

∴ the solution for the system of equations is x = 9, y = 8 OR  (9, 8)

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step-by-step explanation:

step-by-step explanation:

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