Posted by Deborah on Sunday, December 2, 2012 at 9:36pm.
Which system would work best to solve?
Please show work and solve. (all steps)
I honestly don't know how to do this.
- Math - Reiny, Sunday, December 2, 2012 at 10:25pm
I 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
-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 10:52am
Thank you very much....
- equation - jack roger, Wednesday, February 13, 2013 at 9:14am
x + 4y = 54
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