Odpowiedź:
a) x = 8
b) x = - 3
c) x = - [tex]\frac{5}{4}[/tex]
d) x = 4
e) x = - [tex]\frac{3}{10}[/tex]
Szczegółowe wyjaśnienie:
a) 4x - 7 = 2x+9 c) 2 - x = 12 + 7x
4x - 2x = 7+9 - x - 7x = 12 - 2
2x = 16 /:2 - 8x = 10 /: (- 8)
x = 8 x = - [tex]\frac{10}{8}[/tex] = - [tex]\frac{5}{4}[/tex]
b) 3 - 8x = 18 - 3x d) 3x + 5x - 6 = 6x + 2
- 8x + 3x = 18 - 3 8x - 6x = 6 + 2
- 5x = 15 /:(- 5) 2x = 8 /: 2
x = - 3 x = 4
e) 5 - 9x + 6 = 2x + 14 - x
- 9x - 2x + x = 14 - 5 - 6
- 10x = 3 /:(-10)
x = - [tex]\frac{3}{10}[/tex]
