Question

dau 20 de puncte pentru rezolvare

Answer 1

Salut,


(25×a+250):(35:7)-25 = 75
(25×a+250):5 = 75+25
(25×a+250):5 = 100
25×a+250 = 100×5
25×a+250 = 500
25×a = 500-250
25×a = 250
a = 250:25
a = 10.


Succes! :3

Answer 2

(25 x a + 250) : (35 : 7) - 25 = 75
(25 x a + 250) :5 = 75 + 25
(25 x a + 250) :5 = 100
25 x a + 250 = 100 x 5
25 x a + 250 = 500
25 x a = 500 - 250
25 x a = 250
a = 250 : 25
a = 10