Помогите решить уравнения . 1)3/4х+5/8=1/2х-9/16 2)2/3х-5/9=1/3+2х 3)-0.83+0.7у=0.24у+0.412

1) 3/4х + 5/8 = 1/2х - 9/16;
5/8 + 9/16 = 1/2х - 3/4х;
10/16 + 9/16 = 2/4х - 3/4 х;
19/16 = - 1/4х;
х = 19/16 : (-1/4);
х = 19/16 * (4/1);
х = - (19 * 4)/(16 * 1);
х = - (19 * 1)/(4 * 1);
х = -19/4;
х = - 4 3/4.
Ответ: - 4 3/4;
2) 2/3х - 5/9 = 1/3 + 2х;
2/3х - 2х = 1/3 + 5/9;
2/3х - 1 3/3х = 2/9 + 5/9;
- 1 1/3х = 7/9;
х = 7/9 : (-1 1/3);
х = 7/9 : (-4/3);
х = 7/9 * (-3/4);
х = -(7 * 3)/(9 * 4);
х = -(7 * 1)/(3 * 4);
х = -7/12.
Ответ: -7/12;
3) -0.83 + 0.7у = 0.24у + 0.412;
0.7у - 0.24у = 0.412 + 0.83;
0.46у = 1,242;
у = 2.7.
Ответ: 2.7.