👤
a fost răspuns

rezolvati ecUatia 7x+5(x+3)-10x-x=20

Răspuns :

Larisad67
7x+5(x+3)-9x=20
7x(x+3)-9x=20-5
7x(x+3)-9x=15
7x(x+3)-x=15+9
6x(x+3)=24
6x ori x=24-3
7x=21
x=21:7
x=3