Could you please help for brainliest.

Step-by-step explanation:

1) y = -4x - 15  (I)

   y = 7x + 7 (II)

Substitute y = 7x + 7 in equation (I)

7x + 7 = -4x - 15          {Subtract 7 from both sides}}

7x + 7 - 7 = -4x - 15 -7

         7x  = -4x - 22      {Add 4x to both sides}

7x + 4x  = -4x + 4x - 22

        11x = -22

          x = -22/11

        x = -2

Plugin x = -2  in equation (I)

y = -4 * (-2) - 15

  = 8 - 15

y = -7

how is that middle school

step-by-step explanation: