Răspuns :
Metoda algebrică:
T-G=27 ani
T=4G
___________
4G-G=27 ani
3G=27 ani
G=27:3
G=9 ani
T=9×4
T=36 ani
Metoda grafică:
T |----|----|----|----|
G |----|-----27-----|
27:3=9 ani (un segment)
T=9×4=36 ani
G=9 ani
T-G=27 ani
T=4G
___________
4G-G=27 ani
3G=27 ani
G=27:3
G=9 ani
T=9×4
T=36 ani
Metoda grafică:
T |----|----|----|----|
G |----|-----27-----|
27:3=9 ani (un segment)
T=9×4=36 ani
G=9 ani
G=t:4...=> t=4G
t-G=27 ani...=> t=G+27
t) |__|__|__|__|
G) |__|
------------------------------
4G=G+27
4G-G=27
3G=27
G=27:3
G=9 ani are Giulia
t=9*4
t=36 ani are tatal
------------------------------------------------------------------------
t) |___|___|___|___|
G) |___|
---------------------------------
4G-G=3G
3G=27
G=27:3
G=9 ani
t=9*4
t=36 ani
t-G=27 ani...=> t=G+27
t) |__|__|__|__|
G) |__|
------------------------------
4G=G+27
4G-G=27
3G=27
G=27:3
G=9 ani are Giulia
t=9*4
t=36 ani are tatal
------------------------------------------------------------------------
t) |___|___|___|___|
G) |___|
---------------------------------
4G-G=3G
3G=27
G=27:3
G=9 ani
t=9*4
t=36 ani