Question

X-4y=-4
5x – 4y= 12

Answer 1

Answer: x=4 y=2

Explanation:

Answer 2

Answer: {x,y} = {4,2}

[1] x - 4y = -4

[2] 5x - 4y = 12// Solve equation [1] for the variable x

[1] x = 4y - 4

// Plug this in for variable x in equation [2]

[2] 5•(4y-4) - 4y = 12

[2] 16y = 32

// Solve equation [2] for the variable y

[2] 16y = 32

[2] y = 2

// By now we know this much :

x = 4y-4

y = 2

// Use the y value to solve for x

x = 4(2)-4 = 4

Explanation: