which of the following solutions satisfies the system of equations shown below?

Question

bizzeizzy · Answer

attachment

ikram002p · Answer

try to solve them

igreen · Answer

I'm guessing you have to plug in the answer choices?

ganeshie8 · Answer

both ways it is painful

ikram002p · Answer

let her feel pain -.-

igreen · Answer

$-x - 5y - 5z = 2$

$(-2, -3, 3)$

$-(-2) - 5(-3) - 5(3) = 2$

$2 + 15 - 15 = 2$

$17 - 15 = 2$

$-2 = 2$

Welp, I guess that means that $(-2, -3, 3)$ is not the correct answer.

igreen · Answer

LOL @ikram002p

igreen · Answer

I never learned this..lol.

igreen · Answer

$-x - 5y - 5z = 2$

$(-2, 3, -3)$

$-(-2) - 5(3) - 5(-3) = 2$

$2 - 15 + 15 = 2$

$-13 + 15 = 2$

$2 = 2$

Okay, well $(-2, 3, -3)$ is a solution to $-x - 5y - 5z = 2$, we have to check with the other two equations.

$4x - 5y + 4z = 19$

$(-2, 3, -3)$

$4(-2) - 5(3) + 4(-3) = 19$

$-8 - 15 - 12 = 19$

$-23 - 12 = 19$

$-35 = 19$

Okay, since $(-2, 3, -3)$ doesn't satisfy $4x - 5y + 4z = 19$, it is not a solution.

anonymous · Answer

You should let Op do the work green :)

igreen · Answer

$-x - 5y - 5z = 2$

$(2, -3, 3)$

$-2 - 5(-3) - 5(3) = 2$

$-2 + 15 - 15 = 2$

$13 - 15 = 2$

Can you subtract 13 - 15?

igreen · Answer

I'm just doing some of it. @iambatman Plus I think OP went off-line..lol.

anonymous · Answer

Haha, well sometimes the struggle is more important than the solution :P

igreen · Answer

Yep.