3_7 *(3-5x)-4_5*(x-3_5)=0

3/7*(3-5х)-4/5(х-3/5)=0 9/7-15/7х-4/5х+12/25=0 9/7-15/7х-4/5х+12/25=0 15/7х+4/5х=12/25+9/7 75/35х+28/35х=84/175+225/175 103/35х=309/175 х=309/175:103/35 х=3/5