Lamarda62
Lamarda62
10-04-2015
Mathematics
contestada
Y=-5x and 21x-7y=28 using substation method
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parkerandrew92
parkerandrew92
10-04-2015
21x - 7(-5x) = 28
21x + 35x = 28
56x=28
56 = 56
x = .5 or 1/2
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