РЕШИТЕ УРАВНЕНИЕ -4/5a+1+5/6a = 1/2a-2/5
-4/5a+1+5/6a=1/2a-2/5 -4/5a+5/6a-1/2a=-2/5-1 -24/30a+25/30a-15/30a=-1 2/5 -14/30a=-1 2/5 a=-7/5:(-14/30) a=-(7/5•30/14) a=-6/2 a=-3