0.87x6.53+8.7x0.347=8.7x0.653+8.7x0.347=8.7x(0.653+0.347)=8.7x1=8.7
=0.87x6.53+0.87x3.47=0.87x(6.53+3.47)=8.7
=0.87*(6.53+3.47)=0.87*10=8.7