Odpowiedź:
Szczegółowe wyjaśnienie:
a)
2 - 2x = 5
-2x = 3 / : (-2)
x = (-1,5)
b)
[tex]\frac{8-2x}{2} = 10[/tex] / * 2
8 - 2x = 20
- 2x = 12 / : (-2)
x = (-6)
c)
3 * 5x - 7 = 3
15x = 10 / : 15
x = [tex]\frac{10}{15}[/tex]
x = [tex]\frac{2}{3}[/tex]
d)
[tex]\frac{3}{4} x - 5 + \frac{1}{4} x = 10[/tex] / *4
3x - 20 + x = 40
4x = 60 / : 4
x = 15
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Odpowiedź:
Szczegółowe wyjaśnienie:
a)
2 - 2x = 5
-2x = 3 / : (-2)
x = (-1,5)
b)
[tex]\frac{8-2x}{2} = 10[/tex] / * 2
8 - 2x = 20
- 2x = 12 / : (-2)
x = (-6)
c)
3 * 5x - 7 = 3
15x = 10 / : 15
x = [tex]\frac{10}{15}[/tex]
x = [tex]\frac{2}{3}[/tex]
d)
[tex]\frac{3}{4} x - 5 + \frac{1}{4} x = 10[/tex] / *4
3x - 20 + x = 40
4x = 60 / : 4
x = 15