Răspuns:
[tex]c)2x - 1 = 5 = > 2x = 1 + 5 = 6 = > 2x = 6 = > x = 6 \div 2 = 3 = > x = 3[/tex]
[tex]d)(2x + 1 )\div 3 = 3 = > 2x + 1 = 3 \times 3 = 9= > 2x = 9 = x = 4[/tex]
c 1.2x-1=5
2x=5-1=4
x=2
2. 2x-1=-5
2x=-5-1=-6
x=-3
d 1. 2x+1=9
2x=9-1=8
x=4
2. 2x+1=-9
2x=-9-1=-10
x=-5
La d nu stiu:)
(Coroana)
