Упростите:
1) 5/6 * (4,2x - 11/5y) - 5,4 * (2/9x - 1,5y)
2) 1,5 * (8x - 6y) - 2,4 * (5y - 3x)

5/6 * (4,2x - 11/5y) - 5,4 * (2/9x - 1,5y)==5/6*42/10х-5/6*11/5y-54/10*2/9x+54/10*15/10y==3 1/2x-1 5/6y-1 1/5x+8 1/10y==2 3/10x +6 4/15y1,5 * (8x - 6y) - 2,4 * (5y - 3x)==12x-9y-12y+7.2x==19.2x-19y