Răspuns :
a+b=215
b=15+3a
a+15+3a=215
4a+15=215
4a=215-15
4a=200⇒a=200/4⇒a=50
a+b=215
50+b=215⇒b=215-50⇒b=165
b=15+3a
a+15+3a=215
4a+15=215
4a=215-15
4a=200⇒a=200/4⇒a=50
a+b=215
50+b=215⇒b=215-50⇒b=165
notam cu a si b prietenii
a + b= 215 kg
b=15 + 3a includem in adunare si va da
a + 3a + 15 =215
4a = 215 - 15
4a= 200
a = 200: 4
a = 50 kg
b= 150+15=165 kg
a + b= 215 kg
b=15 + 3a includem in adunare si va da
a + 3a + 15 =215
4a = 215 - 15
4a= 200
a = 200: 4
a = 50 kg
b= 150+15=165 kg