Решите уравнения 4/5t+4/15+2/3t=1 1 2/3+4/9z+21/3z=5 5/9

4/5t + 4/15 +2/3t =1
4/5t +2/3t = 1 - 4/15
22/15t = 11/15
t = 11/15 - 22/15
t = - 11/15

1 2/3 + 4/9z + 21/3z = 5 5/9
4/9z + 21/3z = 5 5/9 - 1 2/3
65/9z = 3 8/5
z= 7/13