Odpowiedź :
Odpowiedź:
1.
[tex]s=\frac{w}{r} //*r\\sr = w //: s\\r = \frac{w}{s}[/tex]
2.
[tex]b=4k-3t\\b+3t=4k //:4\\ \\k = \frac{b+3t}{4}[/tex]
3.
[tex]R=b+\frac{1}{4} x\\R-b = \frac{1}{4} x //:\frac{1}{4} \\4(R-b) = x[/tex]
Zadanie 1.
s = [tex]\frac{w}{r}[/tex]|× r
sr = w|: s
r = [tex]\frac{w}{s}[/tex]
Zadanie 2.
b = 4k - 3t
4k - 3t = b
4k = b + 3t|: 4
k = [tex]\frac{b + 3t}{4}[/tex]
Zadanie 3.
R = (b + [tex]\frac{1}{4}[/tex]x)
(b + [tex]\frac{1}{4}[/tex]x) = R
b + [tex]\frac{1}{4}[/tex]x = R
[tex]\frac{1}{4}[/tex]x = R - b|× 4
x = 4(R - b)