Friday

March 6, 2015

March 6, 2015

Posted by **j** on Tuesday, August 14, 2007 at 2:20am.

-5x-9y = -5

x+5y=-15

I've tried this one over and over, but I can't seem to get the right answer. I don't even really know where to start. each time i try to do it, i go about it a little differently and i'm completely lost, pls help!!

from the second equation:

x=-5y-15

now sub that back in the first one:

-5(-5y-15)-9y=-5

25y+75-9y=-5

16y=-5-75

16y=-80

y=-5

now sub that back into x=-5y-15

x=-5(-5)-15

x=25-15

x=10

OR

first equation .....

-5x - 9y = -5

second equation times 5 ...

5x + 25y = -75

add them, the x's are eliminated

16y = -80

y = -5

substitute that in one of the originals, etc

**Answer this Question**

**Related Questions**

Algebra 2 - would some one please check these for me 1. divide x^2-36y^2 over 5x...

Math - 3x-2 over 2 (fraction format) -x over 4 (fraction format) = 15. I know ...

Math - help really needed - I'm sorry to double post; I don't want to seem ...

Simplfing Fractions - Three problems I need to know if I am correct or not if ...

Algebra - x^3-36x over x^2+7x+6, divided by 6x^2-x^3 over x^2+x I know the right...

Math - if f(x) = 2x^2+4 and g(x)=x-3 which number satisfies f(x)= (f o g)(x) A) ...

alg - if n+5-n+3 over n-3-n-5=16 what is the value of n this is an SAT question ...

Algebra - m+3 over 3m, divided by 6m over m+3 Would the solution be 1 over 18m? ...

Physics - Two masses, m1=3kg and m2=2kg, are suspended with a massless rope over...

ALGEBRA - to solve the following: 4-s over 7-s = 3 over s-7... LCD is s-7 then (...