Answer: 
<u>Simplify both sides of the equation</u>
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(Combine Like Terms)

<u>Subtract 2x from both sides</u>
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<u>Divide both sides by 10</u>
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Answer:
21
Step-by-step explanation:
Similar triangles. MNL is just ABC but 3/4 the size.
x = 8*3/4 = 6
perimeter woudl be 6+6+9 = 21
40
100
or the decimal 0.40. Notice that 80 out of 200 and 10 out of 25 are also 40%, since
80
200
=
10
25
=
40
100