2/3х-4/9x=1/5-4/5
6/9x-4/9x=-3/5
10/9=-3/5
x=3/5:10/9
x=-3/5*9/10
x=-27/50
4x+3/4-2x+2/4=1
2х+5/4=1
2х=1-5/4
2х=1-1_1/4
2х=-1/4
х=-1/4:2
<u>х=-1/8</u>
Ок, напишем тут) это НЕвозможно
X^2 = t ≥ 0;
2t^2 - 9 t + 9 = 0;
D = 9^2 - 4*2*9 = 81 - 72 =9 = 3^2;
t1 = (9+3) / 4 = 3; ⇒ x^2 = 3; x = + - sgrt 3;
t2 = (9-3) /4 = 3/2; ⇒ x^2 = 3/2; x = + - sgrt3/2