Question

Solve tghe euation using cramers law 2x-2y-3z=9 3x+z=10 x+y=0

Answer 1

Solve by Substitution :

// Solve equation [3] for the variable y

[3] y = -x

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

[1] 2x - 2•(-x ) - 3z = 9


[1] 4x - 3z = 9

// Solve equation [2] for the variable z

[2] z = -3x + 10

// Plug this in for variable "z" in equation [1]

[1] 4x - 3•(-3x+10) = 9


[1] 13x = 39

// Solve equation [1] for the variable x

[1] 13x = 39

[1] x = 3

// By now we know this much :

x = 3
y = -x
z = -3x+10

// Use the x-value to solve for y

y = -(3) = -3

// Use the x-value to solve for z

z = -3(3)+10 = 1

Answer 2

thanks

Answer 3

@enano64fs Np. :) Just hit the Best response next to me, It helps me out alot :D

Answer 4

@Loser66 lol what do you mean? I already have 2 medals here