Решите уравнение:1) (1цел 1/12+3,75)-(-x)=4,5 2)-(5цел 2/3-1,6)-x=6цел 1/3 3)x-(7цел 5/9-5 1/6)=-3,5 4)x-(4,6+3цел4/7)=-8цел

1) (1 1/12 + 3,75) - (-x) = 4,5;

(1 * 12 + 1)/12 + 375/100 + x = 45/10;

13/12 + 15/4 + x = 45/10;

х = 45/10 - 15/4 - 13/12 = 9/2 - 45/12 - 13/12 = 54/12 - 58/12 = -4/12 = -1/3;

Ответ: х = -1/3.

2) -(5 2/3 - 1,6) - x = 6 1/3;

-(5 * 3 + 2)/3 + 16/10 - x = (6 * 3 + 1)/3;

-17/3 + 8/5 - x = 19/3;

х = -17/3 + 8/5 - 19/3 = -36/3 + 8/5 = -60/5 + 8/5 = -52/5;

Ответ: х = -52/5.

3) x - (7 5/9 - 5 1/6) = -3,5;

x - (7 * 9 + 5)/9 + (5 * 6 + 1)/6 = -35/10;

x - 68/9 + 31/6 = -7/2;

х = -93/18 - 63/18 + 136/18 = -20/18 = -10/9.

Ответ: х = -10/9.

4) x - 4,6 - 3 4/7 = -8 1/14;

x - 46/10 - (3 * 7 + 4)/7 = -(8 * 14 + 1)/14;

x - 46/10 - 25/7 = -113/14;

х = 50/14 - 113/14 + 23/5 = -9/2 + 23/5 = -45/10 + 46/10 = 1/10.

Ответ: х = 1/10.