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1)


B=D


A=X


4x-20=3x-11


4x-3x=20-11


x=9

4x-20+C=180

4.9-20+C=180

C=180-16

C=164




2)


L=M


M+J=180


2x+10+18x+10=180


20x=160


x=8


M=2.8+10=26


J=18.8+10=154


K+J =180


K+154=180


K=26

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