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1. The given equation y + 5x = 8, on solving for y by isolating comes to y = 8 – 5x.

   The values of y for given values of x are,

   x = -1 gives y = 13,

   x = 0 gives y = 8, and

   x = 4, gives y = -12.

   In the question, we are asked to solve the given equation, y + 5x = 8, for y.

   To solve for y, we isolate y, by subtracting 5x from both sides of the equation as follows:

   y + 5x = 8,

   or, y + 5x – 5x = 8 – 5x,

   or, y = 8 – 5x.

   Now, we are asked to find the value of y for each given value of x.

   To find the value of y, we substitute each value of x and simplify the equation.

   1. x = -1:

   y = 8 – 5x,

   or, y = 8 – 5(-1),

   or, y = 8 + 5,

   or, y = 13.

   2. x = 0:

   y = 8 – 5x,

   or, y = 8 – 5(0),

   or, y = 8 – 0,

   or, y = 8.

   3. x = 4:

   y = 8 – 5x,

   or, y = 8 – 5(4),

   or, y = 8 – 20,

   or, y = -12.

   Thus, the given equation y + 5x = 8, on solving for y by isolating comes to y = 8 – 5x.

   The values of y for given values of x are,

   x = -1 gives y = 13,

   x = 0 gives y = 8, and

   x = 4, gives y = -12.

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