Posted by upbeat on Tuesday, July 20, 2010 at 11:39am.
solve by the elimination method
The solution is (___,___)
Please help I am lost on how to work and complete this one.
- Elimination Method Help - drwls, Tuesday, July 20, 2010 at 11:58am
Manipulate the equations so you can eliminate one variable.
One way would be to multiply the first equation by 3, and the second equation by 5. Always do this for BOTH SIDES of the equations.
15x + 15y = -21
35x - 15y = 95
Now add them and the y term is eliminated.
50x = 74
x = 37/25
Use any of the equations with x and y to solve for y. It looks like a rather messy fractional answer.
Check my work; I'm sloppy
- Elimination Method Help - upbeat, Tuesday, July 20, 2010 at 12:54pm
I see where and how you can up with 50x=74 but where did the x=37/25 come from that confuses me.
Thank you for your help
- Elimination Method Help - Ms. Sue, Tuesday, July 20, 2010 at 1:00pm
50x = 74
Divide both sides of the equation by 50.
x = 74/50 = 37/25
- Elimination Method Help - carlo, Thursday, February 9, 2012 at 6:29am
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