Question

помогите решить уравнения пожалуйста срочно

Answer 1

7/9t +11/12 = 13/18
7/9t = 13/18 -11/12 = 26/36 - 33/36
7/9t= - 7/36
t = - 7/36 :7/9 ( -7/9 x 9/7)
t = -1/4
 7/9 x (-1/4) +11/12 =13/18
11/13 -7/36 =13/18
33/36 - 7/36 =13/18
26/36=13/18
13/18=13/18

5/21y -2 = 3 1/14
5/21y = 3 1/14 +2 =5 1/14
y= 5 1/14  : 5/21
y= 71/14 x 21/5 = 1491/70 = 21 21/70

5/21x 21 21/70-2 =3 1/14
5/21 x 1491/70 - 2 =3 1/14
7455/1470 -2 =3 1/14
5 1/14 -2 =3 1/14
3 1/14 = 3 1/14