Wednesday

September 17, 2014

September 17, 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

**Answer this Question**

**Related Questions**

math - 2. Simplify. Please be sure to show all of your work. -3(-9) – |-5 – 3 3...

Algebra - Solve the system of equations using substitution. x + 4y = -5 3x - 8y...

Intermediate Algebra - Solve using elimination method. If the system has no ...

Algebra, help needed - I need help I don't know how to solve this system Solve ...

Algebra - I need help I don't know how to solve this system Solve the following ...

Math - Solve the following equation in the complex number system. Please show ...

math - how to solve (3a squared+3a+3)+(15a squared+2a-9) need the steps on how ...

college algebra--need help please!! - solve the equation in the real number ...

Algebra - Please solve the Linear Equation of P = 200(10)+6000 Please show work ...

Intermediate Algebra (Math) - HELP PLEASE, Solve using the elimination method. ...