3/4(1/2х+2/3)=3х+9/4
3/8х+1/2=3х+9/4
1/2-9/4=3х-3/8х
-7/4=2 5/8х
х= -7/4:21/8= -7/4×8/21
х= -2/3
ответ: -2/3
3/4(1/2х+2/3)=3х+9/4
3/8х+1/2=3х+9/4
1/2-9/4=3х-3/8х
-7/4=2 5/8х
х= -7/4:21/8= -7/4×8/21
х= -2/3
ответ: -2/3