SOLUTION: I have two that use elimination. 1 is whole numbers and one is decimals... 6x-9y=13.5 7y-2x=6.5 0.05x+0.25=44 0.15x+0.05y=48 I must find the ordered pair in each equat

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Question 436210: I have two that use elimination. 1 is whole numbers and one is decimals...
6x-9y=13.5
7y-2x=6.5

0.05x+0.25=44
0.15x+0.05y=48
I must find the ordered pair in each equation...
I have been trying to do my homework for about 10 hours over the past two days and I just can't seem to get it right...please Help!....
Thank you!
Answer by Alan3354(69443) (Show Source):
You can put this solution on YOUR website!
6x-9y=13.5 --> 2x-3y = 4.5 (divided by 3)
7y-2x=6.5
------------
4x - 6y = 9 eqn 1 times 2
21x- 6y = 19.5 eqn 2 times 3
--------------- Subtract
-17x = -10.5
x = 21/34
----------
2(21/34) - 3y = 9/2 = 153/34
-3y = 111/34
y = -37/34
------------------
0.05x+0.25=44 I'll assume you meant 0.25y
0.15x+0.05y=48
---------------
x + 5y = 880 eqn1 times 20
3x + y = 960 eqn2 times 20
Do it like the 1st one.
email your work via the thank you note and I'll check it, if you like.
I must find the ordered pair in each equation...
I have been trying to do my homework for about 10 hours over the past two days and I just can't seem to get it right...please Help!....