Question

решите
(2x+9)/(11-2x)=4

Answer 1

(2x+9)/(11-2x)=4
2х+9=4*(11-2х)
2х+9=44-8х
2х+8х=44-9
10х=35
х=35:10
х=3,5

Проверим:
(2*3,5+9)/(11-2*3,5)=4
16/4=4
4=4

Answer 2

$frac{2x+9}{11-2x}=4 \ 2x+9=4*(11-2x) \ 2x+9=44-8x \ 10x=35 \ x=3.5$