Question

Rezolvati ecuatiile:
25x+36=23x+48
4(3,9+ 0,5 x)=20,8

Answer 1

25x - 23x = 48 - 36
2x = 12
x = 12 : 2
x = 6

15,6 + 2x = 20,8
2x = 20,8 - 15,6 
2x = 5,2
x = 5,2 : 2
x = 2,6

Answer 2

25x+36=23x+48
⇒2x=12⇒x=6∈Z[multimea numerelor intregi ,pozitive];

4[3,9+0,5x]=20,8
⇒15,6+2x=20,8⇒2x=5,2⇒x=2,6;