Решите уравнение: л) -3-5/9*b=-4 13/27
b = 2 2/3
-3-5/9*b=-4 13/27 -5/9*b=-4 13/27+3 -5/9*b=-1 13/27 -b=-1 13/27:5/9 -1 13/27:5/9=-40/27*9/5=-8/3=-2 2/3 -b=-2 2/3 b=2 2/3 проверка -3-5/9*2 2/3=-4 13/27 -3-40/27=-4 13/27 -3-1 13/27=-4 13/27 -4 13/27=-4 13/27