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l:
p - sr² = srl /:sr
[p-sr²]/[sr] = l
l = [p-sr²]/[sr]
s:
p = s (rl + r²) /:[rl+r²]
p/[rl+r²] = s
s = p/[rl+r²]
b) a=√2 bc-bd
b:
a = b(√2c-d) /:[√2c-d]
a/[√2c-d] = b
b = a/[√2c-d]
d:
a-√2bc = -bd
bd = -a+√2bc
bd = √2bc - a /:b
d = [√2bc-a]/b
c) a+bx=x+c
x:
bx-x = c-a
x(b-1)=c-a /:[b-1]
x=[c-a]/[b-1]
d) x-2t=x/m
x :
x - x/m = 2t
x(1 - 1/m) = 2t /:[1-1/m]
x = [2t]/[1-1/m]
lub
x - x/m = 2t
(m/m)x - (1/m)x = 2t
[(m-1)/m]x = 2t /:[(m-1)/m]
x = 2t * [m/(m-1)]
x = [2tm]/[m-1]
lub
x - x/m = 2t /*m
mx - x = 2tm
x(m-1) = 2tm /:[m-1]
x = [2tm]/[m-1]