Tuesday

July 22, 2014

July 22, 2014

Posted by **angel** on Monday, January 31, 2011 at 4:48pm.

my teacher gave me the answer an problem but she wants me 2 work it out

idk how i keep gettin fractions

the problem is:

-3x-4y=21

8x-5y=-9

please help

- algebra -
**helper**, Monday, January 31, 2011 at 5:03pmMultiply by -5 (-3x - 4y = 21)

Multiply by 4 (8x - 5y = -9)

15x + 20y = -105

32x - 20y = -36

47x + 0 = -141

47x = -141

x = -3

8x - 5y = -9

x = -3

8(-3) - 5y = -9

-24 - 5y = -9

-5y = 15

y = -3

- algebra -
**angel**, Monday, January 31, 2011 at 5:11pmty

**Related Questions**

algebra homework - I am having some problem with solving a problem that the ...

Math - I have the problem: A triangle has a base of 3.6 cm and an area of 22.32 ...

Chemistry - Hello, i seem to be stuck on a problem and do'nt know why im not ...

Chemistry - Hello, i seem to be stuck on a problem and do'nt know why im not ...

Chemistry - Hello, i seem to be stuck on a problem and do'nt know why im not ...

algebra 2 - 6y-2(y-4) ________ 3 I keep gettin 4 but my teacher keeps telling me...

8th Grade Algebra-Radicals:Answer Check - Write each expression in simplest form...

math algebra 1a&1b - i keep gettin a decimal or a zero on this problem -3(3x+15...

8th Grade Algebra- Answer Check - Solve each system of equations, give the ...

Algebra - I have this math probelm z-(3z)/(2-z)=(6)/(z-2) in my book it says to ...