Question

Exercice 1 :

1) Si x = 5, que vaut x + 3 ?
2) Si x = 3, que vaut 2x – 1 ?
3) Si x = – 2, que vaut 3 + 5x ?

Answer 1

Si x = 5, alors x + 3 = 5 + 3 = 8.

Si x = 3, alors 2x - 1 = 2(3) - 1 = 6 - 1 = 5.

Si x = -2, alors 3 + 5x = 3 + 5(-2) = 3 - 10 = -7.