Question

Ex. nr. 6 ,va roggggg.

Answer 1

a) 1. Amplificam numarul 125 si rezultatul,adica 200 cu 4.
2. Obtinem : 500/4+x/4-1/4=800
3. Apoi scriem : 500+x-1=800
500+x=801
x=301

La celelalte exercitii se procedeaza asemanator!

Answer 2

6)a)125+x/4-1/4=200⇒500+x-1/4=200⇒499+x/4=200⇒499+x=4×200⇒499+x=800⇒x=800-499⇒x=301
b)(31/8-x)-11/10=0
(25/8-x)-11/10=0
25-8x/8-11/10=0
250-80x-88/80=0
162-80x/80=0
162-80x=0
-80x=-162
x=-162/80
x=-81/40

c)x-2/3-5/6=1/2⇒
6x-4-5/6=1/2⇒
6x-9/6=1/2⇒
2(6x-9)=6⇒12x-18=6⇒12x=18+6⇒12x=24⇒x=24/12⇒x=2
sucees