Răspuns :
a + b = 906
a - 3 = b+ 3 => a = b+6
Inlocuiesti: b+6+b=906 => 2b + 6 = 906
2b = 906 - 6
2b = 900
b= 900/2
b= 450
a+b= 906 => a + 450 = 906 => a = 906 - 450 => a = 456
a - 3 = b+ 3 => a = b+6
Inlocuiesti: b+6+b=906 => 2b + 6 = 906
2b = 906 - 6
2b = 900
b= 900/2
b= 450
a+b= 906 => a + 450 = 906 => a = 906 - 450 => a = 456