Question

-1 2/3(0.6x-6)-2/3(9x+1.5) при x=-2,1

Answer 1

-1_2/3(0.6x-6)-2/3(9x+1.5) = -5/3(3/5 x - 6) - 2/3(9x+1.5) = -x+10-6x-1 = -7x+9

при x=-2,1

-7 * (-2.1) + 9 = 14.7+9 = 23.7