Найдите неизвестные члены пропорций.
1)х/7 = 3/5, x =
2)5/у = 10/9, у =
3)7/6 = а/15, а =
4)2/3 = 5/b, b =

Решите уравнения.
1)5х = 45, х = 45:5, х =
2)-7у = -63, у =
3)3/5z =12, z =
4)2,3c = -16,1, c =
5)n+45 = 51, x =
6)81-3m = 0, m =

1) х/7 = 3/55х = 21х = 4,22) 5/у = 10/9у = 4,53) 7/6 = а/156а = 105а = 17,54) 2b = 15b = 7,55) 5х = 45х = 96) -7у = -63у = 97) 3/5z = 12z = 208) 2,3c = -16,1c = -79) n + 45 = 51n = 610) 81 - 3m = 03m = 81m = 27