Friday

February 27, 2015

February 27, 2015

Posted by **Sira** on Tuesday, May 8, 2012 at 1:27am.

2x - y + 2z = 11

x - 2y - 3z = -5

-3x + z = -3

- Alg2 -
**Bosnian**, Tuesday, May 8, 2012 at 3:08am- 3 x + z = - 3 Add 3 x to both sides

- 3 x + 3 x + z = - 3 + 3 x

z = 3 x - 3

x - 2 y - 3 z = - 5

x - 2 y - 3 * ( 3 x - 3

) = - 5

x - 2 y - 3 * 3 x - 3 * ( - 3 = - 5

x - 2 y - 9 x + 9 = - 5

- 8 x - 2 y + 9 = - 5 Add 8 x - 9 to both sides

- 8 x - 2 y + 9 + 8 x - 9 = - 5 + 8 x - 9

- 2 y = - 14 + 8 x Divide both sides by - 2

y = - 14 / - 2 + 8 x / - 2

y = 7 - 4 x

2 x - y + 2 z = 11

2 x - ( 7 - 4 x ) + 2 * ( 3 x - 3 ) = 11

2 x - 7 + 4 x + 6 x - 6 = 11

12 x - 13 = 11 Add 13 to both sides

12 x - 13 + 13 = 11 + 13

12 x = 24 Divide both sides by 12

x = 24 / 12

x = 2

y = 7 - 4 x

y = 7 - 4 * 2

y = 7 - 8

y = - 1

z = 3 x - 3

z = 3 * 2 - 3

z = 6 - 3

z = 3

Solution :

x = 2 , y = - 1 , z = 3

**Answer this Question**

**Related Questions**

alg2 check? - Graph the system of inequalities then substitute the (x,y)order ...

ALG2! - 1.7 - 0.78>5 solve please

alg2 - how do i solve for: 2^(x+1) =9 3e^(x-8) +5=14 log2x=4 and ln(2x-5)=4? ...

alg2 - Solve: 3x − 7 (sqrt x) + 2 = 0

ALG2! - -3K - 8 is less than or equal to 5k .....solve please

alg2 - solve for 10/x^2-2x + 4/x = 5/x-2 3x/x+1 + 6/2x = 7/x 8(x-1)/x^2-4 = 4/x-...

Math(alg2) - solve the exponential equation 5(2)^2x - 4 = 13 thanks

Alg2 - Solve the equation -5e^-x + 9 = 6 I subtracted 9 to both sides and got: -...

Math Homework - Hello! I need help with these math questions, thanks! :) 1.) ...

alg2 check? - solve: 2x+2(x+3)=2(x+7) what I got was x=4 but I really think I ...