1) x≠8
(x+2 -x+1)/(x-8)=3/2
3/(x-8) = 3/2
x-8=2
x = 10
2) x≠-5 : x≠1
4x·(x-1) - x·(x+5)= 3(x+5)(x-1)
4x² - 4x - x² - 5x = 3x² +15x - 3x - 15
21x= 15
x = 5/7
3) (5x-2)/(2x-3) - 19/2(2x-3) = 7/2
2x-3≠0 ⇒ x≠3/2 = 1'1/2
2(5x-2) - 19 = 7(2x-3)
10x - 4 - 19 = 14x - 21
4x = -2
x = -1/2
4) x≠5 ; x≠6 ; x≠8
8(x-6)(x-8) - 9(x-5)(x-8) + (x-5)(x-6) =0
8x² -8·14x +8·48 -9x² +9·13x - 9·40 + x² - 11x + 30 = 0
6x = 54
x = 9
5) x≠ -2 ; x ≠ -3
4(x+3) + 7(x+2) = 4
11x = -22
x = -2 не уд.
нет решения