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17-03-2020
Mathematics

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What is the value of y using the elimination method
4x - 5y = -9
-4x + y = -7

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hanifchoirunnisa hanifchoirunnisa

17-03-2020

4x - 5y = -9

-4x + y = -7

----------------- +

-4y = -16

y = 4

-4x + y = -7

-4x + 4 = -7

-4x = -11

x = 11/4

x = 2,75

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