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x-5x=t
x(1-5)=t/:(1-5)
x=t/1-5
b)p=a+x+ax
a+x+ax=p
x(1+a)=p-a
x=p-a/:(1+a)
x= p-a/1+a
c) m=(x-1)p-3x
(x-1)p-3x=m
xp-p-3x=m
x(p-3)=m+p
x=m+p/:(p-3)
x=m+p/p-3
d)w=1/x + p
1/x+p=w/ * x
1+xp=xw
xp-xw=-1
x(p-w)=-1
x=-1/:(p-w)
x= -1/p-w
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