Odpowiedź :
1. 2x+6=14
1.2x= 14-6
1.2x= 8 /:1.2
x= 6[tex]\frac{2}{3}[/tex]
1-4x=2
-4x= 2-1
-4x=1 /:-4
x= - [tex]\frac{1}{4}[/tex]
x+1/3=7
x= 7- [tex]\frac{1}{3}[/tex]
x=6[tex]\frac{2}{3}[/tex]
1/2x+1=4
1/2x= 4-1
1/2x= 3 /: 1/2
x=6
1.
[tex]2x+6 = 14\\\\2x = 14-6\\\\2x = 8 \ \ /:2\\\\x = 4[/tex]
2.
[tex]1 - 4x = 2\\\\-4x = 2-1\\\\-4x = 1 \ \ /:(-4)\\\\x = -\frac{1}{4}[/tex]
3.
[tex]x + \frac{1}{3} = 7 \ \ /\cdot3\\\\3x + 1 = 21\\\\3x = 20 \ \ /:3\\\\x = 6\frac{2}{3}\\\\\\Lub \ zaleznie \ od \ zapisu:\\\\\frac{x+1}{3} = 7 \ \ /\cdot3\\\\x+1 = 21\\\\x = 21-1\\\\x = 20[/tex]
4.
[tex]\frac{1}{2}x + 1 = 4\\\\\frac{1}{2}x = 4-1\\\\\frac{1}{2}x = 3 \ \ /\cdot 2\\\\x = 6[/tex]