Odpowiedź :
Odpowiedź:
a) 6x=3 /:6
x= 3/6= 1/2
b) -3x= 7 /*(-1)
3x= - 7 /:3
x= - 7/3= - 2 i 1/3
c) 2x= 1/5 /:2
x= 1/5:2= 1/5*1/2= 1/10
x= 1/10
d) 1,2 x = 4,8 /:1,2
x= 4,8:1,2= 48 :12=4
x=4
e) 1/3x=3 /:1/3
x= 3:1/3= 3*3=9
x=9
f) - 3/5 x = -5 /*-1)
3/5 x= 5 /:3/5
x= 5:3/5= 5* 5/3= 25/3= 8 i 1/3
x= 8 i 1/3
g) 3/4x= 4/9 /: 3/4
x= 4/9:3/4= 4/9*4/3= 16/27
x=16/27
h) 0,1x = -7 /:0,1
x= -7:0,1= - 70 :1= - 70
x= - 70
Szczegółowe wyjaśnienie:
Cześć!
Szczegółowe wyjaśnienie:
a)
[tex]6x = 3 \\ 6x \div 6 = 3 \div 6 \\ x = \frac{3 \div 3}{6 \div 3} \\ x = \frac{1}{2} [/tex]
b)
[tex] - 3x = 7 = \\ - 3x \div ( - 3) = 7 \div ( - 3) \\ x = \frac{7}{3} [/tex]
c)
[tex]2x = \frac{1}{5} \\ 2x \div 2 = \frac{1}{5} \div 2 \\ x = \frac{1}{5} \cdot \frac{1}{2} \\ x = \frac{1}{10} [/tex]
d)
[tex]1.2x + 4.8 = \\ \frac{6}{5} x + \frac{24}{5} = \\ \frac{6}{5} \cdot(x + 4)[/tex]
e)
[tex] \frac{1}{3} x = 3 = \\ 3 \cdot \frac{1}{3} x = 3 \cdot3 \\ x = 9[/tex]
f)
[tex] - \frac{3}{5} x = 5 \\ - \frac{5}{ 3} \cdot( - \frac{3}{5} ) = \\ x = - \frac{5}{3} \cdot5 = \\ x = - \frac{25}{3} [/tex]
g)
[tex] \frac{4}{3} x = - \frac{4}{9} = \frac{3}{4} x \cdot \frac{3}{4} x = \frac{4}{3} \cdot( - \frac{4}{9} ) = \\ x = - \frac{16}{27} [/tex]
[tex]0.1x = - 7 \\ 0.1x \div 0.1 = - 7 \div 0.1 \\ x = - 70[/tex]