Solution: 8/5÷(x-0.45)×5= 16/5×5

8(x-0.45)= 16

8x-8×0.45= 16

8x-3.6= 16

8x-3.6+3.6= 16+3.6

8x= 19.6

8x \8 = 19.6 \8

x=2.45

2、5×( 17-x)=35

Solution: 5×( 17-x)÷5=35÷5.

17-x=7

17-x+x=7+x

17=7+x

17-7=7+x-7

x= 10