0.41         12.3
_______ =  ____
0.6х-2.5      15

0.41\0.6х-2.5=12.3\1512.3*(0.6х-2.5)=0.41*157.38х-30.75=6.157.38х=6.15+30.757.38х=36.9х=36.9:7.38х=5