83685+(20216-537999:1507)*80-502*968=83685+(20216-357)*80-502*968=83685+19859*80-502*968=83685+1588720-485936=1672405-485936=1186469
6•(x+427)=1576
6х+2562=1576
6х=1576-2562
Х=-986/6
Х=-164 1/3
1) -10х=2
х= 2:(-10)
х =-0,2
2) 16х=-7
х=-7:16
х=-0,4375
3) -14х=-7
х=-7:(-14)
х=0,5
2/11*(14 1/3+2 1/6)= 2/11*16 1/2=3;
Ответ: 3.