15-02-2018
Mathematics

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-8x+y=9 and 5x-y=3 solved by substitution- thank you in advance :)

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cineusstanleyy cineusstanleyy

15-02-2018

-8x + y = 9
5x - y = 3

- 3x = 12
x = -4

5(-4) -y = 3
-20 - y = 3
-y = 20 + 3
- y = 23
y = - 23

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