а)5/7x + 9/7x=32 б) 3/4y+5/6y-7/12y =3 Помогите(

5/7x + 9/7x = 32 14/7x = 32 2x = 32 x = 16 -------------------------3/4y + 5/6y - 7/12y = 3 9/12y + 10/12y - 7/12y = 36/12 9y + 10y - 7y = 36 12y = 36 y = 3

б) 3/4y+5/6y-7/12y=39+10-7/12y=312/12y=31y=3y=3:1y=3