Решите уравнение: а)  5(х - 18) - 7х = 21+х;                г)  6(х - 1)+12(3 - 2х) = 45 - 17х;
б)  Зх+6(- х) = - 2(2+х);              д)  15(3 - х) - 5(х+11) = 1 - 19х;
в)  1,7 - 8(х - 1) = 3,7+2х;              е)  - (5 - х) - 8(6+х) = 11,8+х.
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