Реши уравнения: 1) x/2+x/4=-3 2) 7/9x-3/4x=5/18 3) 3/7x-4x=2

1) x/2+x/4=-3; 2х/4+х/4=-3; 3х:4=-3; 3х=-3*4; Х=-12:3; Х=-4; 2) 7/9x-3/4x=5/18; 28/36х-27/36х=5/18; Х=5/18*36/1; Х=10; 3) 3/7x-4x=2; 3/7х-3 7/7х=2; -3 4/7х=2; Х=2/1*(-7/25); Х=-14/25