Решите уравнения , Срочно .   3x+5 = 0,5x+10 ; 2,6+2x=1,9x+6,6 ;  x+(x+1)+(x+2)=9 ; (z-2)+(z-1)+z=-3 ; 21+ (20-4x)-(11-2x)=0 ; 2u-3(7-2u)=3 ; 12-y =5(4-2y)+10 ; 2-2(x-8)=4x-4 .
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