Răspuns :
a
b=a+2
a+a+2=158
2a=158-2
2a=156
a=78
b=a+2=78+2=80
SAU
a ____
b ____ _ (a+2)
158 - 2 = 156
156 : 2 segmente = 78
a = 78
b= 78+2=80
b=a+2
a+a+2=158
2a=158-2
2a=156
a=78
b=a+2=78+2=80
SAU
a ____
b ____ _ (a+2)
158 - 2 = 156
156 : 2 segmente = 78
a = 78
b= 78+2=80
a+a+2 = 158
a I--I
a+2 I--I+2 }158
egalam segmentele
158-2 = 156
aflam nr. a
156:2 = 78
aflam nr. a+2
78+2 = 80
Verificare
78+80 = 158
a I--I
a+2 I--I+2 }158
egalam segmentele
158-2 = 156
aflam nr. a
156:2 = 78
aflam nr. a+2
78+2 = 80
Verificare
78+80 = 158