Răspuns:
7. 15.08
8. x=0
Sper ca te-am ajutat!
Explicație pas cu pas:
7.
2.6·{5.8+6.25·[9.3-3.1·(8.76-2·2.88)]}
=2.6·{5.8+6.25·[9.3-3.1·(8.76-5.76)]}
=2.6·[5.8+6.25·{9.3-3.1·3)]
=2.6·[5.8+6.25·{9.3-9.3)]
=2.6·(5.8+6.25·0)
=2.6·5.8
=15.08
8.
[1.2+3.2·(3x+0.75)]:3=3.6
3.2·(3x+0.75)/3=3.6-1.2
(3x+0.75)/3=2.4/3.2
(3x+0.75)/3=24/32
3x+0.75=0.75
3x=0.75-0.75
3x=0 => x=0
