x=m+y/b b≠0
1/x=1/a-1/4 x≠0 i a≠0 i a≠4
1/x=(4-a)/4a
x=4a/(4-a)
a) x-y/b=m |*b
x-y=bm |+y
x=bm+y
b)1/a-1/x=1/4 |*x
x/a-1=x/4
x/a-x/4=1
x(1/a-1/4)=1
x=1/(1/a-1/4)
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x=m+y/b b≠0
1/x=1/a-1/4 x≠0 i a≠0 i a≠4
1/x=(4-a)/4a
x=4a/(4-a)
a) x-y/b=m |*b
x-y=bm |+y
x=bm+y
b)1/a-1/x=1/4 |*x
x/a-1=x/4
x/a-x/4=1
x(1/a-1/4)=1
x=1/(1/a-1/4)