2 Answers

Karma: 2042400

Might be this > http://www.wolframalpha.com/input/?i=k%2b(-45%3d-18&incTime=true

12 years ago. Rating: 3
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Karma: 71700

k + (-45 = -18

k - 45 = -18

Add +45 to both sides:

k - 45 = -18

+45 +45

k = 27

Check:

Put 27 in place of k:

27 - 45 = -18

-18 = -18

12 years ago. Rating: 2
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