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2(R-4) = 5(L-4)
2R-8 = 5L-20
2R = 5L -12
R+8 = 3/2 ( L+8)
2R+16 = 3L+24
5L-12+16 = 3L+24
5L+4= 3L+24
2L = 20
L=10
Por lo tanto: R = 19