(14-2x)+(9x+36)=89
14-2x+9x+36=89
-2x+9x+14+36=89
-2x+9x=7x
14+36=50
7x+50=89
7x=89-50
7x=39
x=39:7
х=5,57142857143
(14-2x)+(9x+36)=89
14-2x+9x+36=89
-2x+9x+14+36=89
-2x+9x=7x
14+36=50
7x+50=89
7x=89-50
7x=39
x=39:7
х=5,57142857143