Wednesday

July 23, 2014

July 23, 2014

Posted by **Anonymous** on Wednesday, January 7, 2009 at 8:47pm.

the question is: x-8y=18

-16x+16y=-8

i did :

first multiplied the first equation with 2

then

2x-16y=36

-16+16y=-8

-----------

-14x=28

x=28/-14

x=-2

now

x-8y=18

(-2)-8y=18

-8y=18+2

-8y=20

y=20/-8

y= 2.5

plz help me what did i do wrong??

- math help urgent -
**Sally**, Wednesday, January 7, 2009 at 8:55pmI can't see anything besides that y=-2.5 because you divide by a negitive

- math help urgent -
**Anonymous**, Wednesday, January 7, 2009 at 9:01pmoo....ok thanks sally

**Related Questions**

Math - PreCalc (12th Grade) - Which rectangular equation corresponds to these ...

math-algebra - Simplify: [(4x^3y)(4^2xy)^-1]/(4xy^2) A. x /16y^2 B. 16x/y^2 C. x...

alg. - solve the system by addition: -5x-9y = -5 x+5y=-15 I've tried this one ...

algebra - What are the factors of the following trinomial? 16y^2 - 12y + 2 a) (...

Math I really need help! - Multiply and simplify by factoring. Assumem that all ...

math - Q: Convert 4x^2 + 4y^2 -8x -16y -29 = 0 into standard form. I first ...

Math - 9x^2+16y^2-18x+64y-71=0 find the coordinates of the center, the foci, and...

Math - Factor: (x^3)(z^6)-27y^9 81x^4-16y^4 2x^3+16y^3

Algebra - Totally confused-learned this today and I don't get it-Please help ...

Algebra I - 16y^{2}-40y+? I really need to figure out what the question mark is...