Решите уравнение -5x+3(3+2x)=7, 2u-3(7-2u)=3, 2-2(x-8)=4x-4

1) - 5x + 3(3 + 2x) = 7;- 5x + 3 * 3 + 3 * 2x = 7;- 5x + 9 + 6x = 7;x + 9 = 7;x = 7 – 9;x = - 2.Ответ. – 2. 2) 2u - 3(7 - 2u) = 3;2u – 3 * 7 – 3 * (- 2u) = 3;2u – 21 + 6u = 3;8u – 21 = 3;8u = 3 + 21;8u = 24;u = 24 : 8;u = 3.Ответ. 3.3) 2 - 2(x - 8) = 4x – 4;2 – 2 * x – 2 * (- 8) = 4x – 4;2 – 2x + 16 = 4x – 4;18 – 2x = 4x – 4;- 2x – 4x = - 4 – 18;- 6x = - 22;x = - 22 : (- 6);x = 3 4/6;x = 3 2/3.Ответ. 3 2/3.