Afla valoarea lui a. 10x100x10xA=10x100+90x100​

Răspuns :

Răspuns:

10×100×10×a=10×100+90×100 ⇔

⇔ 10000a=100(10+90) ⇔

⇔ 10000a=100×100 ⇔

⇔ 10000a=10000 /:10000 ⇒ a=1