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24-08-2017
Mathematics

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GH=7y+3, HI=3y-5, GI=9y+7. What is the value of Y

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texaschic101 texaschic101

24-08-2017

GH = 7y + 3 , HI = 3y - 5, GI = 9y + 7

7y + 3 + 3y - 5 = 9y + 7
10y - 2 = 9y + 7
10y - 9y = 7 + 2
y = 9 <===

lets check that..
7(9) + 3 + 3(9) - 5 = 9(9) + 7
63 + 3 + 27 - 5 = 81 + 7
93 - 5 = 81 + 7
88 = 88 (correct)

so yes, y = 9

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