Posted by Kelley on Sunday, December 20, 2009 at 7:20pm.
5x+5y=11
7x3y=19
I am told that my answer is
wrong, can you help me
(1.24, 3.44)

math  Reiny, Sunday, December 20, 2009 at 7:27pm
Whoever told you that you were wrong, copy this and show them
if x=1.24, y=3.44
equation#1
LS = 5(1.24) + 5(3.44)
= 6.2  17.2
= 11
= RS
equation #2
LS = 7(1.24)  3(3.44)
= 8.68 + 10.32
= 19
= RS
Trust yourself !!

math  drwls, Sunday, December 20, 2009 at 7:32pm
Multiply both sides of the the last equation by 5/3, to give
11.667 x  5y = 31.667
Add that to the first equation and you get
16.667x = 20.667
x = 1.24
y = (7x19)/3 = 3.44
If that was your answer, rounded off to three significant figures, then you are correct.
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