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Need help assap look in the picture

Need help assap look in the picture-example-1
User Landon
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1 Answer

8 votes
8 votes

Answer:

8

Explanation:

To find the perimeter, you must add the lengths of all sides.

In this question the perimeter is given, which is 63.


63 = 12 + 12 + 3x + 2x + 1 + x + 2


1. Add the numbers


63 = 12 + 12 + 3x + 2x + 1 + x + 2

12 + 12 + 1 + 2 = 27

63 = 27 + 3x + 2x + x

2. Combine Like Terms

63 = 27 + 3x + 2x + x

x = 1
3x + 2x + 1x = 6x

63 = 27 + 6x


3. Move Variable to the left

63 = 27 + 6x

63 = 6x + 27


4. Subtract 27 from both sides, the opposite of adding 27


63 = 6x + 27

63 - 27 = 6x + 27 - 27

36 = 6x


5. Divide by the same factor, the opposite of multiplying 6


36 = 6x

36/6 = 6x/6


6. Cancel out the 6s but leave the x

36/6 = 6x/6

x = 6


So, now that we know that x = 6 we can solve the expression, x + 2, to find out the length of the side BC.


6 + 2 = 8

User Pillblast
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