14*(0.6x-6/7y)-1/8*(16.8x+6y) если=x=5/9 y=10

Question

14*(0.6x-6/7y)-1/8*(16.8x+6y) если=x=5/9 y=10

Answer 1

14*(0.6x-6/7y)-1/8*(16.8x+6y) = 8,4x - 12y - 2,1x  - 3/4y = 6,3x - 12,75y
если  x=5/9 y=10
6,3*5/9 - 12,75*10 = 3,5 - 127,5  = -124