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31-05-2017
Mathematics

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3x – 7y = 5
9y = 5x + 5

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fussellk fussellk

31-05-2017

elmination method......

multiplied top by 5 and bottom by 3

15x - 35y = 25
-15x +27y = 15
-8y = 40
y = -5

plug -5 in.....
3x - 7(-5) = 5
3x +35 = 5
3x = -30
x = -10

(-10,-5)

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