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2010-01-27T18:44:14+01:00
B) 2(x+m)=m-4x+5
2x+2m=m-4x+5
2m-m=-4x-2x+5
m=-6x+5

d) x-3(n+2x)=4n+2x
x-3n-6x=4n+2x
x-6x-2x=4n+3n
-9x=7n
x=-7/9n


b) 3nx-4m=nx+bn
3nx-nx=bn+4m
2nx=bn+4m |:2n
x=(bn+4m)/2n
x=bn/2n+4m/2n
x=b/2+2m/n


d) 3px-b+c=7px+4c
3px-7px=4c+b-c
-4px=3c+b |:-4p
x=-(3c+b)/4p
x=-3c/4p+b/4p