Решите уравнения: 1) 2000/х = 40 2) y/70 = 5 3) (60 * a - 32) : 16 = 3 4) 75 - 960 : (b+39) = 55 5) 12 7/23 - (6 18/23 - t) = 3 21/23 + 5 19/23 6) (k - 5 3/14) + 8 13/14 = 15 - 3 9/14

1) x = 2000/40 x = 50 2) y = 70*5 y = 350 3) 60*a - 32 = 3*16 60*a - 32 = 48 60*a = 48 + 32 60*a = 80 a = 80:60 a = 1 1/3 4) 960:(b+39) = 75 - 55 960:(b+39) = 20 b+39 = 960:20 b+39 = 48 b = 48 - 39 b = 9 5) 12 7/23 - (6 18/23 - t) = 9 17/23 6 18/23 - t = 11 30/23 - 9 17/23 6 18/23 - t = 2 13/23 t = 6 18/23 - 2 13/23 t = 4 5/23 6) (k - 5 3/14) + 8 13/14 = 11 5/14 k - 5 3/14 = 10 19/14 - 8 13/14 k - 5 3/14 = 2 6/14 k = 2 6/14 + 5 3/14 k = 7 9/14