Răspuns :
a+b = 25
inlocuiesti a cu b+5
b + 5 + b = 25 | -5
2b = 20 | :2
b = 10
a + 10 = 25 | - 10
a = 15
inlocuiesti a cu b+5
b + 5 + b = 25 | -5
2b = 20 | :2
b = 10
a + 10 = 25 | - 10
a = 15
a+b=25
a=b+5
a I..............II....5..I
b I..............I acolada 25
25-5=20(doua parti egale)
20:2=10(b)
10+5=15(a)
a=b+5
a I..............II....5..I
b I..............I acolada 25
25-5=20(doua parti egale)
20:2=10(b)
10+5=15(a)