\input zb-basic \input zb-matheduc \iteman{ZMATH 2015b.00729} \itemau{Fern\'andez, Francisco; Lupi\'a\~nez, Jos\'e Luis} \itemti{Representation of quantities using linear segments to solve elementary algebra problems. (La representaci\'on de cantidades mediante segmentos lineales para resolver problemas de \'algebra elemental.)} \itemso{Rico, Luis (ed.) et al., Investigaci\'on en did\'actica de la matem\'atica. Homenaje a Encarnaci\'on Castro. Granada: Universidad de Granada (ISBN 978-84-9045-095-6/pbk). 103-110 (2013).} \itemab Summary: We present a graphic method for solving algebraic problems by using segments. In addition, we partially summarize a research and we propose a didactical activity for a secondary classroom in which students show a high performance in solving algebraic word problems by using this method. \itemrv{~} \itemab Resumen: En este trabajo presentamos un m\'etodo gr\'afico para resolver problemas algebraicos mediante el uso de segmentos de recta. Adem\'as, describimos parte de una investigaci\'on en la que se dise\~na un material para un aula de secundaria y en donde los escolares logran un alto rendimiento al resolver problemas algebraicos verbales usando este m\'etodo. \itemrv{~} \itemcc{H23 G23 D53 F93} \itemut{elementary algebra; graphic representation; problem solving; linear segments} \itemli{} \end