4/15(1,5х+3/8)-0,77(8/11х-3/7)
4/15(1,5х+3/8)-0,77(8/11х-3/7)=
=4/15(3/2х+3/8)-77/100(8/11х-3/7)=
=2/5х+1/10-14/25х+33/100=
=-4/25х+43/100=
=-0,16х+0,43