Respuesta :

QRS = QRC + CRS
7 + 41x = 111 + 4 + 14x
41x - 14x = 115 - 7
27x = 108
x = 108/27
x = 4

QRS = 7 + 41x
= 7 + (41 x 4)
= 7 + 164
= 171
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