Sagot :
bjr
4x - 5 = 35
4*x - 5 = 35
4*x = 35 + 5
4*x = 40
4*x/4 = 40/4
x = 10
on a bien 4*10 - 5 = 40 - 5 = 35
et
9x = 27
9x/9 = 27/9
x = 3
on a bien 9*3 = 27
Réponse :
A) 4x - 5 = 35
4x = 35 + 5
4x = 40
4x ÷ 4 = 40 ÷ 4
x = 10
B) 9x = 27
9x ÷ 9 = 27 ÷ 9
x = 3
Explications étape par étape