Question

Directions: Solve each system of equations by graphing.

y= x - 8
y = 2x + 1

Answer 1

Answer:

Step-by-step explanation:

Solution - Linear equations with two unknowns y=x−8;y=−2x+1y,x=-5,3See StepsStep by Step SolutionSystem of Linear Equations entered :   [1]    y - x = -8

  [2]    y + 2x = 1

Graphic Representation of the Equations :    x + y = -8        2x + y = 1  

 

Solve by Substitution :// Solve equation [2] for the variable  y    [2]    y = -2x + 1

// Plug this in for variable  y  in equation [1]   [1]    (-2x+1) - x = -8

  [1]     - 3x = -9

// Solve equation [1] for the variable  x    [1]    3x = 9 

  [1]    x = 3 

// By now we know this much :     y = -2x+1

   x = 3// Use the  x  value to solve for  y     y = -2(3)+1 = -5 

Solution : {y,x} = {-5,3}