Решите уравнение:
1) -6,5+x=-12

2)x-8 4/9=-35 8/27

3) Ix+7I=6

1) -6,5+x=-12
х=-12+6,5
х=-5,5

2)x-8 4/9=-35 8/27
х=-35 8/27+8 4/9
х=-35 8/27+8 12/27
х=-34 35/27+8 12/27
х=-26 23/27

3) Ix+7I=6
х+7=6
х=-1

х+7=-6
х=-13