Уравнение решить a) 5 (2-3d) - 4 (6+2d) = 28 - (d-2)

б) - 2 (3x+4) + (6x+8) = 4 (5x-2) - (5x+8)

в) 8 (4-3y) - (7-2y) = - (6+3y) + 8 (y-2)

a) 5 (2-3d) - 4 (6+2d) = 28 - (d-2) 10-15d-24-8d=28-d+2

-23d+d=14+30

22d=-44

d=-2

б) - 2 (3x+4) + (6x+8) = 4 (5x-2) - (5x+8)

-6x-8+6x+8=20x-8-5x-8

0=15x-16

-15x=-16

x=16/15

x=1 1/15

в) 8 (4-3y) - (7-2y) = - (6+3y) + 8 (y-2)

32-24y-7+2y=-6-3y+8y-16

-22y+25=5y-22

-22y-5y=-25-22

-27y=-47

y=47/27

y=1 20/27 проверить надо ...