Question

Please help me ill give crown

Answer 1

{x,y} = {12,20}

Explanation:

Equations Simplified or Rearranged :

[1] 5x - y = 40

[2] -2x + y = -4

Graphic Representation of the Equations :

y + 5x = 40 y - 2x = -4

Solve by Substitution :

// Solve equation [2] for the variable y

[2] y = 2x - 4

// Plug this in for variable y in equation [1]

[1] 5x - (2x-4) = 40

[1] 3x = 36

// Solve equation [1] for the variable x

[1] 3x = 36

[1] x = 12

// By now we know this much :

x = 12

y = 2x-4

// Use the x value to solve for y

y = 2(12)-4 = 20

Solution :

{x,y} = {12,20}