Odpowiedź:
a)
4/x = 7/11 | *x
4 = 7x/11 | *11
44 = 7x | /7
x = [tex]4\frac{2}{7}[/tex]
b)
2x/(3+x) = 5/6 | *(3+x)
2x = (15+5x)/6 | *6
12x = 15 + 5x | -5x
7x = 15 | /7
x = [tex]2\frac{1}{7}[/tex]
c)
x/5 = 3/-4 | *5
x = -15/4
x = [tex]-3\frac{3}{4}[/tex]
d)
x+1/x = 3/2 | *x
x+1 = 3x/2 | *2
2x+2 = 3x | -2x
x = 2
