1)
5х 10 5х 10 5х - 10 5 (х - 2)
------ + ---------- = ---------- - ---------- = ------------ = -------------- = 5
х - 2 2 - х х -2 х - 2 х -2 х -2
2)
6 *
√ 25 * 2 6 * 5 * √2
----------------- = --------------- = 10
√9 * 2 3 * √2
3)
6 - х 8
------- = -х + ----
4 3
6 - х -3х 8
------- = --------- + ----
4 3 3
6 - х 8 -3х
------- = ---------
4 3
3 * (6 - х) = 4 * (8 - 3х) 18 - 3х = 32 - 12х 12х - 3х = 32 - 18 9х = 14 х = 14 / 9