SOLUTION: How do you work the problem 18 = -a + 2

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Question 408647: How do you work the problem 18 = -a + 2
Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!

18+=+-a+%2B+2......add a to both sides
18%2Ba+=+-a%2Ba%2B+2
18%2Ba+=+-cross%28a%29%2Bcross%28a%29%2B+2
18%2Ba+=+2..........add -18 to both sides
18%2Ba+-18+=+2-18
cross%2818%29%2Ba+-cross%2818%29+=+-16
a=-16