Gasiti nr natural x
(X+13) +87=200
3× x + 81=381


Răspuns :

(x+13)+87=200
(x+13)=200-87
(x+13)=113
x=113-13
x=100

3x+81=381
3x=381-81
3x=300
x=100

cel mai bun raspuns?