Friday

April 18, 2014

April 18, 2014

Posted by **Deborah** on Sunday, December 2, 2012 at 9:36pm.

-9x+2y=-69

Which system would work best to solve?

Please show work and solve. (all steps)

Thank You

I honestly don't know how to do this.

- Math -
**Reiny**, Sunday, December 2, 2012 at 10:25pmI would use elimination, where we attempt to get the coefficients of either x or y to be the same or to be opposite

1st equation --> 6x - 4y = 54

2nd times 2 --> -18x + 4y = -138

add them:

-12x = -84

divide by -12

x = 7

sub back into the first

6(7) - 4y = 54

-4y = 12

y = -3

x = 7, y = -3

sub those values into both equations to verify that my answer is correct (it works !)

- Math -
**Deborah**, Monday, December 3, 2012 at 10:52amThank you very much....

- equation -
**jack roger**, Wednesday, February 13, 2013 at 9:14amx + 4y = 54

**Related Questions**

Math - Please help!!!! Solve each system graphically. Be sure to check your ...

Math - Solve the system by addition or substitution. 3x – 4y = 8 6x – 2y = 10 ...

math - two systems of equations are given below for each system, choose the best...

math,algebra - I'm not understanding so the answer should read as follows and ...

derivative - I am finding the second derivative of (x^2)(y^3) = 1 2x(y^3) + (x^2...

math - Solve the system 6x+4y = 12 9x+6y = 18 If the system has infinitely many ...

Algebra - 4x+2y-3z=7 2x+4y+z=35 6x+2y-2z=20 solve the system

math 2 - Solve the following system using the elimination method: -6x + 2y = 5 ...

Algebra - I have a few questions I need help with! 1. Solve the system by ...

Algebra 2 - Solve this system by substitution: 2x-3y=12 x-4y=6 Slve this system ...