Помогите!
1/6(х+9) = -1/3х
3/4(х+8) = 2х+1

1/6*(х+9)=-1/3х
6*1/6*(х+9)=-6*1/3х
х+9=-2х
х+2х=-9
3х=-9
х=-3

3/4*(х+8)=2х+1
3/4х+6=2х+1
4*3/4х+4*6=4*2х+4*1
3х+24=8х+4
3х-8х=4-24
-5х=-20
х=4