Question

Solve the following system of equations.
x + 3y + 2z = -16
2x - y + 2z = -15
2x - 2y - z = 1

Answer 1

http://www.algebra.com/algebra/homework/Matrices-and-determiminant/cramers-rule-3x3.solver

Answer 2

do it on your own.....

Answer 3

Eh ummm @Hero

Answer 4

I do not like your response to me on the last question I helped you on. So good luck on this one, but I will not help you

Answer 5

http://calculator.tutorvista.com/system-of-equations-solver.html

Answer 6

Lol @texaschic101 I was kidding tho

Answer 7

I do not like someone telling me " I suck " ...even if they are kidding. So, good bye

Answer 8

You're awesome and beautiful @texaschic101

Answer 9

could you help me

Answer 10

You do not suck @texaschic101 I suck

Answer 11

x + 3y + 2z = -16 -->(-2)
2x - y + 2z = -15
----------------
-2x - 6y - 4z = 32 (result of multiplying by -2)
2x - y + 2z = -15
----------------add
0 _ 7y - 2z = 17
-7y - 2z = 17

2x - y + 2z = -15 -->(-1)
2x - 2y - z = 1
---------------
-2x + y - 2z = 15 (result of multiplying by -1)
2x - 2y - z = 1
----------------add
0 - y - 3z = 16
-y - 3z = 16

-7y - 2z = 17
-y - 3z = 16 -->(-7)
--------------
-7y - 2z = 17
7y + 21z = - 112 (result of multiplying by -7)
--------------add
0 + 19z = - 95
19z = -95
z = - 5

now sub -5 in for z
-7y - 2z = 17
-7y -2(-5) = 17
-7y + 10 = 17
-7y = 17 - 10
-7y = 7
y = -1

now sub known values into any original equation
2x - 2y - z = 1
2x -2(-1) - (-5) = 1
2x + 2 + 5 = 1
2x + 7 = 1
2x = 1 - 7
2x = -6
x = -3

lets check our answers
2x - y + 2z = -15
2(-3) -(-1) + 2(-5) = -15
-6 + 1 - 10 = -15
-16 + 1 = -15
-15 = -15 (correct)

answer : x = -3, y = -1, z = -5 or (-3,-1,-5)

Learn not to be rude and you will make more friends that are willing to help you