Odpowiedź :
Odpowiedź:
[tex]8x+4=12\\\\8x=12-4\\\\8x=8\ \ /:8\\\\x=1\\\\\\-3x-5=12x+5\\\\-3x-12x=5+5\\\\-15x=10\ \ /:(-15)\\\\x=-\frac{10}{15}\\\\x=-\frac{2}{3}\\\\\\\frac{3}{5}x-4=4x+7\ \ /*5\\\\3x-20=20x+35\\\\3x-20x=35+20\\\\-17x=55\ \ /:(-17)\\\\x=-\frac{55}{17}\\\\x=-3\frac{4}{17}[/tex]
8x + 4 = 12 |-4
8x = 12 - 4
8x = 8 |: 8
x = 1
- 3x - 5 = 12x + 5 | - 12x
- 3x - 12x - 5 = 5 |+5
-3x - 12x = 5 + 5
-15x = 10 |: -15
x = [tex]-\frac{2}{3}[/tex]
3/5 x - 4 = 4x + 7 | * 5
3x - 20 = 20x + 35 |-20
3x - 20x - 20 = 35 |+ 20
3x - 20x = 55
- 17x = 55 |:-17
x = [tex]-\frac{55}{17} = -3\frac{4}{17}[/tex]