First you combine like terms. Adding 5n and 4n together to get 9n+3=30. Then you subtract 3 from 30 and end up with 9n=27.
Then you divide 27 by 9 and end up with n=3.
So the answer is 3.
Answer:
Step-by-step explanation:
Base + 4 triangles
(18.4)(27.6) + 2(½×27.7×17.6) + 2(½×18.4×20.4)
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</em>C<em>ount how many times 6 goes into 31 that is 5. Remainder 1. Which means </em>