Răspuns :
x-prima bucata
y-a2a bucata
x+y=150cm
x-78=y inlocuim in suma
x+x-78=150
2x-78=150
2x=150+78
2x=228cm |:2
x=114cm
y=114-78
y=36cm
y-a2a bucata
x+y=150cm
x-78=y inlocuim in suma
x+x-78=150
2x-78=150
2x=150+78
2x=228cm |:2
x=114cm
y=114-78
y=36cm
Fie m- bucata mare iar m-bucata mica
DEci
m+n=150cm
Inlocuim m-78=n si obtinem
m+m-78=150
2m-78=150
2m=228cm
m=114cm
Atunci
n=114-78 rezulta n=36cm
Rs : bucata mica are 36 cm
DEci
m+n=150cm
Inlocuim m-78=n si obtinem
m+m-78=150
2m-78=150
2m=228cm
m=114cm
Atunci
n=114-78 rezulta n=36cm
Rs : bucata mica are 36 cm