Odpowiedź :
Odpowiedź:
a) 2x-5-x-3=8
2x-x = 8+5+3
x = 16
b) 6-x-x/2=4
-x-1/2x = 4-6
- 3/2x = -2 | *(-2/3)
x = 4/3 = 1 1/3
c) 3/4x-x-1=0
3/4x-x = 1
-1/4x = 1 | *(-4)
x = -4
d) 1/5x+3=5-1/2x
1/5x+1/2x = 5-3
2/10x+5/10x = 2
7/10x = 2 | *10/7
x = 20/7 = 2 6/7
Szczegółowe wyjaśnienie:
Licze na naj
Odpowiedź:
a) 2x-5-x-3=8 2x-x=8+5+3
x=16
b)
[tex]6 - x - \frac{x}{2} = 4 \: \: \: \: \: \: \: \: \: \: \times 2[/tex]
[tex]2 \times 6 - 2 \times x - 2 \times \frac{x}{2} = 2 \times 4[/tex]
[tex]12 - 2x - x = 8[/tex]
[tex] - 3x = 8 - 12[/tex]
[tex] - 3x = - 4 \: \: \: \: \: \: \: \div - 3[/tex]
[tex]x = \frac{4}{3} [/tex]
[tex]x = 1 \frac{1}{3} [/tex]
c)
[tex] \frac{3}{4} x - x - 1 = 0[/tex]
[tex] - \frac{1}{4} x = 1 \: \: \: \: \: \: \div - \frac{1}{4} [/tex]
[tex]x = - 4[/tex]
d)
[tex] \frac{1}{5} x + 3 = 5 - \frac{1}{2} x[/tex]
[tex] \frac{1}{5} x + \frac{1}{2} x = 5 - 3[/tex]
[tex] \frac{2}{10} x + \frac{5}{10} x = 2[/tex]
[tex] \frac{7}{10} x = 2 \: \: \: \: \: \: \: \: \div \frac{7}{10} [/tex]
[tex]x = 2 \frac{6}{7} [/tex]