hannahbrooke2 hannahbrooke2

29-01-2017
Geography

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How do I find y on 13?

How do I find y on 13 class=

Respuesta :

JustScience JustScience

29-01-2017

9y - 77 = 12x - 28

therefore you first need to find x:
7x + 12 = 12x - 28
-5x = -40
x = 8

then you use x = 8
9y - 77 = 12×8 - 28
9y = 96 - 28 + 77
9y = 145
y = 16.11

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