Question

-7|y-0,8|+|6y-3,4|. Вроде ещё y=8

Answer 1

$- 7 |y - 0.8 | + |6y - 3.4| \\ - 7 |8 - 0.8| + |6 \times 8 - 3.4| \\ - 7 |7.2| + |48 - 3.4| \\ - 7 \times 7.2 + |44.6| \\ - 50.4 + 44.6 \\ - 5.8 \\ \\ otvet = - 5.8$