Posted by **helpme!!!!!!!!!** on Sunday, March 15, 2009 at 10:02pm.

solve and comparison:

a)4x-9y+4

6x+15y=-13

im so lost!!!!!

- 9th grade -
**helpme!!!!!!!!!**, Sunday, March 15, 2009 at 10:05pm
srry

it's

solve and comparison:

a)4x-9y=4

6x+15y=-13

im so lost!!!!!

- 9th grade -
**SraJMcGin**, Sunday, March 15, 2009 at 10:29pm
Help me is NOT the name of this post. Math or Algebra.

Sra

- Algebra -
**PsyDAG**, Monday, March 16, 2009 at 10:38am
4x-9y=4

6x+15y=-13

To solve, first isolate x (or y) in one of the equations.

4x = 4 + 9y

x = 1 + 2.25y

Substitute the right hand portion for x in the second equation.

6(1 + 2.25y) + 15y = -13

Solve for y. Put that value into the first equation to solve for x. To check, put both values into the second equation.

I hope this helps. Thanks for asking.

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