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y/0,25=x
b) k= 1/4 n podzielić przez1/4
k podzielic przez 1/4 = n
4k=n
c) y=2t-1
2t-1=y
2t=y+1 /2
t= (y+1)/2
d) v=at²/2 /*2
2v=at² /t²
2v/t²=a
e) R=abc/4P / *4P
R4P=abc / 4R
P= abc/4R
y=0,25x / :0,25
x=y:0,25
b) k=1/4n ; n=?
k=1/4n / :1/4
n=k:1/4
c) y=2t-1 ; t=?
y=2t-1 / +1
y+1=2t / :2
t=(y+1):2
d) v=at²/2 ; a=?
v=at²/2 / ×a
v×a=t²/2 / :v
a = (t²/2) : v
e) R=abc/4P ; P=?
R=abc/4P / ×abc
R × abc = 4P / :4
P = Rabc/4