Question

Помогите с алгеброй !
Решите уравнения :
1 ) 3 - 5/7t =1 - 3/7t
2) 1/8u - 2 + 5/8u + 1
3) 2/5z - 7 = 3

Answer 1

1) 3/7t-5/7t=1-3
-2/7t=-2
t=7
2) во втором где равно?
3)2/5z=10
z=25

Answer 2

1) 3/7t-5/7t=1-3
-2/7t=-2
t=7

Answer 3

2) 3

Answer 4

3)2/5z=10
z=25