Odpowiedź :
a) 2� + 8 = 16
2� = 16 - 8
2� = 8 |÷2
�= 4
b) 4� − 7 = � + 9
4� -� = 9 + 7
3�= 16
�=16/3
c) 3(� + 2) = 2� − 7
3� + 6 = 2� -7
3�- 2� = - 7 - 6
�= -13
[tex]Zadanie\ 6\\\\a)\\\\2x+8=16\ \ \ \mid-8\\\\2x=8\ \ \ \mid:2\\\\x=4\\\\b)\\\\4x-7=x+9\ \ \ \mid+7\\\\4x=x+16\ \ \ \mid-x\\\\3x=16\ \ \ \mid:3\\\\x=\frac{16}{3}\\\\x=5\frac{1}{3}\\\\c) \\\\3(x+2)=2x-7\ \ \ \mid-2x\\\\3x+6-2x=-7\ \ \ \mid-6\\\\x=-13[/tex]