Упростите выражения:
1) 8x-5y-7y=
2) 1,5x+2y-3x-y=
3) -0,24+1,25n+0,12+1,25n=
4) (-0,3x+2)-(5-0,2x)=
5) 0,2-(3y-0,8)+4=
6)-3(2,4-0,1x)+2,7x=
7) (-21)(x+y)-3(x-y)=
8) -2n(2m-1)+(6-2n)(-m)=
9) 4(3-0,4x)-2(0,6x+3)=
10)b-(2b+(3b-4))=
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