Răspuns:
a) x=2
b) x=4
c) x=-11/5
d) x=-5
Explicație pas cu pas:
a)
2x-1 = 7
2x = 8
x=8:4
x=2
b)
2(x-3)=x-2
2x-6 = x-2
2x-x = 6-2
x=4
c)
4(x+3)-2(x-5) = -3x+11
4x+12 -2x+10 = -3x+11
4x-2x+3x = -12 -10 +11
5x = -11
[tex]x=-\frac{11}{5}[/tex]
d) [tex]\frac{x+2}{3} -2 = \frac{x-1}{2}[/tex]
[tex]\frac{x+2}{3} - \frac{x-1}{2} = 2[/tex]
[tex]\frac{2x+4-3x+3}{6} = 2[/tex]
-x+7 = 12
-x = 12-7
-x = 5
x = -5
