Question

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B) 2k-2z=16
2k+2z=32

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Answer 1

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2k-2z=16 (-1)

2k+2z=32

------------------

-2k+2z=-16

2k+2z=32

---------------- subtraindo os termos:

4z=16

z=16/4= 4

2k+2(4)=32

2k=32-8

k= 24/2

k= 12