Răspuns :
a:b=3 rest 7
a=3xb+7
a+b=631
aritmetic prin metoda grafica
a l----l----l----l+7
b l----l }suma lor=631
(631-7):4=624:4=156 (b) al doilea nr.
3x156+7=468+7=475 (a) al doilea nr.
algebric avem:
a+b=631
a=3xb+7
3xb+7+b=631
4xb=631-7
b=624:4=156
a=3x156+7=475
a=3xb+7
a+b=631
aritmetic prin metoda grafica
a l----l----l----l+7
b l----l }suma lor=631
(631-7):4=624:4=156 (b) al doilea nr.
3x156+7=468+7=475 (a) al doilea nr.
algebric avem:
a+b=631
a=3xb+7
3xb+7+b=631
4xb=631-7
b=624:4=156
a=3x156+7=475
a+b=631
a=3•b+7
3•b+7+b=631
4b=631-7
4b=624
b=624:4 => b=156
a+156=631
a=631-156 => a=475
a=3•b+7
3•b+7+b=631
4b=631-7
4b=624
b=624:4 => b=156
a+156=631
a=631-156 => a=475