Respuestas
Respuesta:
PQ = 23 QR = 50 RS = 45
Explicación paso a paso:
hay que graficar
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P Q R S
------------------------- 128 ----------------------------
QR - 4 = 2PQ (QR - 4)/2 + QR - 5 + QR = 128
QR - 5 = RS (QR - 4)/2 + 2QR - 5 = 128
QR - 4/2 + 2QR/1 = 123
50 - 4 = 2PQ QR - 4 . 1 + 2QR . 2/2 . 1 = 123
46 = 2PQ QR - 4 + 4QR/2 = 123
23 = PQ 5QR - 4/2 = 123
5QR - 4 = 246
50 - 5 = RS 5QR = 250
45 =RS QR = 50