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Danny Avila
Mathematics
23 August, 03:37
X+y=100 4.50+20y=822.00 solve for x and y
+2
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Rayne Campbell
23 August, 03:43
0
If you have a scientific calculator then plug it into your matrix button ... As [1 4.50]
[1 20]
[100 822]
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Ryder Reynolds
23 August, 03:55
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Without a scientific calculator!
x+y = 100 | * (-20) = > - 20x - 20y = - 2000
4.50x+20y=822.00 (+) = >
=> - 15.50x = - 1178.00 = > x = 1178.00/15.50 = 76 = > y = 100 - 76 = > y = 24.
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