№1

2(х-7y+3z) = 2x-14y+6z

-7(5-a-4b)= -35-7a+28b

(c - 8d+6d) * (-1,2)= -1,2c+9.6d-7.2d

-p(-x+2y-4.6)= px-2py+4.6p

-0,6x(-5+3m-1.4n)= 3x-1.8mx+0.84nx

-8( a+- -0.6)= -6a-4b+2.5c+4.8

№2

(x + 2,3) - (x + 7,8) = x + 2.3 - x - 7.8 = x - x + 2.3 - 7.8 = -5.5

-(7,2 - у) + (-у + 1,6) = -7.2 + y - y + 1.6 = 1.6 - 7.2 = -5.6;