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a= 2x-3x+1
a = -1x+1
b)2(x+m)=m-4x+5 m-oblicz m
2x+2m=m-4x+5
2m-m=-4x-2x+5
m=-6x+5
d)x-3(n+2x)=4n+2x x - oblicz x
x-3n-6x=4n+2x
x-2x-6x=4n+3n
-5x=7n/(-5)
x=-7/5n